Witches do not spawn as frequent as they should in witchhuts

how many other hostile mobs are in the world?

Thank you for your report!
However, this issue has been temporarily closed as a Awaiting Response.

We do not have enough information to find the cause of this issue.
Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|http://hopper.minecraft.net/help/finding-minecraft-data-folder]) here.

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There were at that moment close to no hostile mobs in the world.
I've attatched the crashreport.

Forced entities: 235 total; [ane['Cod'/27145, l='MpServer', x=10077.19, y=54.03, z=2061.53], ane['Cod'/27146, l='MpServer', x=10077.58, y=53.99, z=2060.40], ane['Cod'/27147, l='MpServer', x=10077.02, y=53.99, z=2060.86], ari['Zombie'/18956, l='MpServer', x=10074.50, y=20.00, z=2036.50], ane['Cod'/27148, l='MpServer', x=10078.03, y=54.47, z=2061.24], ari['Zombie'/18957, l='MpServer', x=10074.50, y=20.00, z=2038.50], ane['Cod'/27149, l='MpServer', x=10078.04, y=53.99, z=2061.34], ane['Cod'/27150, l='MpServer', x=10093.01, y=52.83, z=2062.88], ane['Cod'/27151, l='MpServer', x=10092.05, y=53.15, z=2063.84], aqf['Creeper'/18960, l='MpServer', x=10076.50, y=20.00, z=2038.50], ane['Cod'/27152, l='MpServer', x=10092.82, y=52.97, z=2064.15], aqf['Creeper'/18961, l='MpServer', x=10077.50, y=20.00, z=2037.50], ane['Cod'/27153, l='MpServer', x=10038.64, y=52.99, z=2055.05], ane['Cod'/27155, l='MpServer', x=10038.52, y=52.99, z=2055.61], ane['Cod'/27156, l='MpServer', x=10039.65, y=53.00, z=2055.13], ane['Cod'/27158, l='MpServer', x=10040.03, y=46.01, z=2045.10], ane['Cod'/27159, l='MpServer', x=10040.98, y=53.13, z=2055.76], ane['Cod'/27160, l='MpServer', x=10032.28, y=54.71, z=2059.99], ane['Cod'/27161, l='MpServer', x=10040.22, y=53.00, z=2055.05], ane['Cod'/27162, l='MpServer', x=10031.72, y=54.86, z=2061.95], ane['Cod'/27163, l='MpServer', x=9941.68, y=46.01, z=1995.91], ane['Cod'/27164, l='MpServer', x=9943.66, y=46.01, z=1995.27], ane['Cod'/27165, l='MpServer', x=9941.70, y=46.00, z=1995.06], ane['Cod'/27166, l='MpServer', x=9942.29, y=46.00, z=1994.76], ane['Cod'/27167, l='MpServer', x=9942.26, y=46.00, z=1995.41], ane['Cod'/27168, l='MpServer', x=9942.85, y=45.96, z=1996.01], ane['Cod'/27169, l='MpServer', x=9942.81, y=46.12, z=1994.35], ane['Cod'/27170, l='MpServer', x=9942.82, y=45.99, z=1995.17], aqf['Creeper'/15907, l='MpServer', x=9964.69, y=22.06, z=1976.61], aqf['Creeper'/29223, l='MpServer', x=10075.50, y=18.00, z=2055.50], aqf['Creeper'/20527, l='MpServer', x=9977.50, y=26.00, z=2071.50], ari['Zombie'/17457, l='MpServer', x=9960.50, y=22.00, z=1968.50], ane['Cod'/27189, l='MpServer', x=10059.03, y=35.99, z=2055.66], ane['Cod'/27190, l='MpServer', x=10055.05, y=36.06, z=2057.15], ane['Cod'/27191, l='MpServer', x=10054.46, y=35.99, z=2057.28], ane['Cod'/27192, l='MpServer', x=10052.99, y=35.91, z=2056.12], ane['Cod'/27193, l='MpServer', x=10053.86, y=36.02, z=2057.21], ane['Cod'/27194, l='MpServer', x=10054.40, y=36.03, z=2056.73], ane['Cod'/27195, l='MpServer', x=10067.44, y=38.05, z=2058.15], ane['Cod'/27196, l='MpServer', x=10067.57, y=37.97, z=2058.82], ang['Dolphin'/26705, l='MpServer', x=10043.18, y=51.47, z=2041.35], ane['Cod'/26706, l='MpServer', x=10039.59, y=45.96, z=2044.10], ane['Cod'/26708, l='MpServer', x=10040.82, y=45.93, z=2046.55], ari['Zombie'/85, l='MpServer', x=9950.50, y=27.00, z=1942.50], ane['Cod'/26709, l='MpServer', x=10041.03, y=46.02, z=2045.29], ane['Cod'/86, l='MpServer', x=9949.60, y=62.70, z=1950.76], ane['Cod'/26711, l='MpServer', x=10040.20, y=45.99, z=2046.11], ane['Cod'/26712, l='MpServer', x=10056.96, y=46.03, z=2037.67], ane['Cod'/26713, l='MpServer', x=10058.17, y=45.89, z=2037.29], arc['Spider'/90, l='MpServer', x=9952.50, y=25.00, z=1943.50], ani['Mooshroom'/93, l='MpServer', x=9966.73, y=66.00, z=2042.15], aqf['Creeper'/94, l='MpServer', x=9967.50, y=11.00, z=2071.50], ari['Zombie'/6241, l='MpServer', x=10087.50, y=45.00, z=2031.50], ang['Dolphin'/26722, l='MpServer', x=10070.89, y=55.82, z=2044.63], ane['Cod'/26723, l='MpServer', x=10071.79, y=56.03, z=2041.93], cvm['Valazay'/71, l='MpServer', x=10018.36, y=72.52, z=2019.59], ane['Cod'/26724, l='MpServer', x=10072.29, y=56.40, z=2041.08], ane['Cod'/26725, l='MpServer', x=10072.67, y=55.99, z=2040.98], ani['Mooshroom'/102, l='MpServer', x=9979.17, y=69.00, z=2009.17], ane['Cod'/26726, l='MpServer', x=10072.56, y=56.10, z=2040.40], ani['Mooshroom'/103, l='MpServer', x=9980.23, y=71.00, z=2001.52], ane['Cod'/26727, l='MpServer', x=10071.55, y=56.02, z=2040.73], ani['Mooshroom'/104, l='MpServer', x=9978.28, y=66.00, z=2010.41], ane['Cod'/26728, l='MpServer', x=10071.98, y=55.98, z=2041.28], ani['Mooshroom'/105, l='MpServer', x=9971.50, y=69.00, z=2004.84], ane['Cod'/26729, l='MpServer', x=10071.02, y=55.98, z=2041.61], ani['Mooshroom'/106, l='MpServer', x=9986.18, y=65.00, z=2012.51], ane['Cod'/26730, l='MpServer', x=10058.42, y=57.10, z=2012.59], ani['Mooshroom'/107, l='MpServer', x=9978.16, y=66.00, z=2015.39], ane['Cod'/26731, l='MpServer', x=10059.18, y=60.99, z=2026.99], ani['Mooshroom'/108, l='MpServer', x=9972.72, y=65.00, z=2006.34], ani['Mooshroom'/109, l='MpServer', x=9979.38, y=69.00, z=2018.78], ane['Cod'/26733, l='MpServer', x=10058.40, y=60.97, z=2027.30], ani['Mooshroom'/110, l='MpServer', x=9972.88, y=65.00, z=2025.49], ane['Cod'/26734, l='MpServer', x=10059.25, y=61.00, z=2027.62], ani['Mooshroom'/111, l='MpServer', x=9974.53, y=72.00, z=2040.80], ane['Cod'/26735, l='MpServer', x=10058.15, y=61.01, z=2027.90], ani['Mooshroom'/112, l='MpServer', x=9976.49, y=66.00, z=2041.22], ane['Cod'/26736, l='MpServer', x=10058.46, y=57.00, z=2010.76], aqz['Skeleton'/113, l='MpServer', x=9975.50, y=26.00, z=2072.50], ane['Cod'/26737, l='MpServer', x=10057.89, y=57.04, z=2010.15], aqf['Creeper'/114, l='MpServer', x=9975.50, y=26.00, z=2072.50], ane['Cod'/26738, l='MpServer', x=10059.88, y=57.03, z=2009.35], aqf['Creeper'/115, l='MpServer', x=9980.20, y=35.00, z=2070.52], aqf['Creeper'/34419, l='MpServer', x=10065.50, y=15.00, z=2072.70], ane['Cod'/116, l='MpServer', x=9980.37, y=49.00, z=2099.53], apy['Cobblestone'/119, l='MpServer', x=10011.24, y=34.00, z=2013.13], apy['Snow Block'/120, l='MpServer', x=10009.13, y=34.00, z=2014.44], amy['Bat'/121, l='MpServer', x=10003.75, y=45.10, z=2019.25], aqf['Creeper'/123, l='MpServer', x=10007.50, y=20.00, z=2059.50], aqz['Skeleton'/34939, l='MpServer', x=10036.50, y=14.00, z=2085.50], aqi['Enderman'/124, l='MpServer', x=10013.50, y=14.00, z=2074.50], ari['Zombie'/125, l='MpServer', x=10014.50, y=14.00, z=2074.50], aqf['Creeper'/34943, l='MpServer', x=10036.50, y=14.00, z=2087.50], ane['Cod'/26752, l='MpServer', x=10091.87, y=57.00, z=2030.18], aqz['Skeleton'/129, l='MpServer', x=10007.50, y=43.00, z=2075.50], ane['Cod'/26753, l='MpServer', x=10091.58, y=56.55, z=2030.74], aqz['Skeleton'/130, l='MpServer', x=10007.64, y=43.00, z=2076.48], ane['Cod'/26754, l='MpServer', x=10091.49, y=56.85, z=2029.63], ane['Cod'/26755, l='MpServer', x=10091.94, y=56.97, z=2030.77], aqz['Skeleton'/132, l='MpServer', x=10000.48, y=42.00, z=2076.70], ane['Cod'/26756, l='MpServer', x=10091.96, y=57.07, z=2032.69], ane['Cod'/26757, l='MpServer', x=10091.22, y=56.96, z=2031.53], ane['Cod'/26758, l='MpServer', x=10090.53, y=57.06, z=2029.76], ane['Cod'/135, l='MpServer', x=10010.20, y=60.68, z=2075.59], ane['Cod'/26759, l='MpServer', x=10092.11, y=57.02, z=2031.39], ane['Cod'/136, l='MpServer', x=10009.02, y=61.02, z=2075.44], aqi['Enderman'/137, l='MpServer', x=10016.50, y=14.00, z=2074.50], amy['Bat'/139, l='MpServer', x=10032.60, y=17.10, z=2021.04], amy['Bat'/140, l='MpServer', x=10036.88, y=17.10, z=2022.25], ane['Cod'/26765, l='MpServer', x=10058.58, y=56.93, z=2009.53], ane['Cod'/26766, l='MpServer', x=10057.74, y=57.00, z=2009.47], ane['Cod'/26767, l='MpServer', x=10058.46, y=57.04, z=2008.93], ane['Cod'/26768, l='MpServer', x=10059.32, y=56.96, z=2009.60], ane['Cod'/26769, l='MpServer', x=10059.10, y=56.95, z=2010.66], ane['Cod'/26770, l='MpServer', x=10062.23, y=53.93, z=2011.17], ane['Cod'/26771, l='MpServer', x=10062.94, y=53.97, z=2012.05], ane['Cod'/26772, l='MpServer', x=10062.39, y=54.04, z=2011.71], ane['Cod'/149, l='MpServer', x=10053.05, y=60.00, z=1991.87], ari['Zombie'/150, l='MpServer', x=10050.50, y=20.00, z=2015.50], aqf['Creeper'/151, l='MpServer', x=10053.30, y=16.00, z=2013.70], aqf['Creeper'/153, l='MpServer', x=10059.50, y=16.00, z=2016.64], aqf['Creeper'/154, l='MpServer', x=10050.30, y=16.00, z=2012.77], aqf['Creeper'/155, l='MpServer', x=10050.80, y=20.00, z=2027.23], ane['Cod'/160, l='MpServer', x=10046.32, y=46.98, z=2073.01], aqz['Skeleton'/164, l='MpServer', x=10068.50, y=26.00, z=2044.50], ari['Zombie'/165, l='MpServer', x=10068.50, y=22.00, z=2035.50], aqf['Creeper'/167, l='MpServer', x=10072.50, y=21.00, z=2059.50], ari['Zombie'/168, l='MpServer', x=10064.50, y=25.00, z=2056.50], amy['Bat'/169, l='MpServer', x=10074.45, y=20.10, z=2062.59], asx['Minecart with Chest'/170, l='MpServer', x=10076.50, y=8.06, z=2066.51], ari['Zombie'/173, l='MpServer', x=10066.50, y=18.00, z=2072.50], aqz['Skeleton'/174, l='MpServer', x=10077.83, y=18.00, z=2070.15], aqi['Enderman'/180, l='MpServer', x=10075.91, y=18.00, z=2067.54], aqz['Skeleton'/181, l='MpServer', x=10074.40, y=18.00, z=2076.52], aqz['Skeleton'/183, l='MpServer', x=10067.50, y=20.00, z=2076.50], aqf['Creeper'/184, l='MpServer', x=10069.50, y=18.00, z=2088.50], ari['Zombie'/185, l='MpServer', x=10070.50, y=18.00, z=2090.50], ane['Cod'/27326, l='MpServer', x=9964.46, y=54.97, z=2071.49], asx['Minecart with Chest'/191, l='MpServer', x=10090.50, y=23.00, z=2056.31], ane['Cod'/27327, l='MpServer', x=9964.50, y=54.66, z=2071.96], aqf['Creeper'/192, l='MpServer', x=10089.50, y=23.00, z=2063.50], ane['Cod'/27328, l='MpServer', x=9963.93, y=54.98, z=2072.04], ane['Cod'/27329, l='MpServer', x=9963.22, y=54.99, z=2071.26], aqf['Creeper'/194, l='MpServer', x=10084.16, y=26.00, z=2055.48], ane['Cod'/27330, l='MpServer', x=9964.36, y=55.00, z=2070.96], ari['Zombie'/195, l='MpServer', x=10080.30, y=22.00, z=2070.92], ane['Cod'/27331, l='MpServer', x=9962.63, y=55.01, z=2071.39], ane['Cod'/196, l='MpServer', x=10095.51, y=57.38, z=2074.74], ane['Cod'/27332, l='MpServer', x=9963.81, y=55.02, z=2070.92], ane['Cod'/27333, l='MpServer', x=9963.16, y=55.02, z=2072.37], ane['Cod'/27334, l='MpServer', x=9959.28, y=57.10, z=2080.62], ane['Cod'/27335, l='MpServer', x=9959.13, y=56.97, z=2082.23], ane['Cod'/27336, l='MpServer', x=9964.51, y=55.06, z=2072.09], ane['Cod'/27337, l='MpServer', x=9958.50, y=57.12, z=2078.97], ane['Cod'/27338, l='MpServer', x=9958.80, y=56.90, z=2081.47], ane['Cod'/27339, l='MpServer', x=9959.88, y=57.18, z=2080.59], ane['Cod'/27340, l='MpServer', x=9959.73, y=56.98, z=2078.80], ane['Cod'/27341, l='MpServer', x=9961.17, y=57.10, z=2080.05], ane['Cod'/26841, l='MpServer', x=9995.50, y=52.97, z=1942.50], aqf['Creeper'/8413, l='MpServer', x=9993.50, y=14.00, z=2074.50], ane['Cod'/26855, l='MpServer', x=9993.81, y=48.00, z=2068.59], ane['Cod'/26858, l='MpServer', x=9993.25, y=48.00, z=2068.36], arc['Spider'/20731, l='MpServer', x=10075.50, y=18.00, z=2071.50], aqf['Creeper'/20736, l='MpServer', x=10072.50, y=18.00, z=2074.50], ari['Zombie'/20737, l='MpServer', x=10074.50, y=18.00, z=2075.50], ang['Dolphin'/26891, l='MpServer', x=10085.53, y=46.86, z=1942.57], ane['Cod'/26892, l='MpServer', x=10081.54, y=54.97, z=1946.88], ane['Cod'/26893, l='MpServer', x=10083.95, y=54.69, z=1945.44], ane['Cod'/26895, l='MpServer', x=10082.50, y=55.28, z=1946.69], ane['Cod'/26897, l='MpServer', x=10082.82, y=55.13, z=1946.00], ane['Cod'/26899, l='MpServer', x=10083.39, y=55.36, z=1945.43], ane['Cod'/26934, l='MpServer', x=10068.26, y=59.99, z=2070.23], ane['Cod'/26935, l='MpServer', x=10068.70, y=59.90, z=2071.58], ane['Cod'/26936, l='MpServer', x=10068.90, y=60.00, z=2071.04], ane['Cod'/26937, l='MpServer', x=10068.05, y=60.07, z=2071.33], ant['Squid'/26938, l='MpServer', x=10072.63, y=59.02, z=2070.92], aqz['Skeleton'/29517, l='MpServer', x=10072.50, y=9.00, z=2048.50], aqz['Skeleton'/29518, l='MpServer', x=10071.50, y=9.00, z=2048.50], ane['Cod'/26962, l='MpServer', x=10039.15, y=52.99, z=2056.32], amy['Bat'/14694, l='MpServer', x=10006.57, y=20.05, z=2046.44], ane['Cod'/26987, l='MpServer', x=10032.76, y=54.94, z=2061.37], ane['Cod'/26988, l='MpServer', x=10033.41, y=54.98, z=2061.14], ane['Cod'/26989, l='MpServer', x=10045.59, y=47.00, z=2073.69], ane['Cod'/26991, l='MpServer', x=10046.45, y=46.92, z=2073.82], ane['Cod'/26992, l='MpServer', x=10045.85, y=46.96, z=2072.43], ang['Dolphin'/26993, l='MpServer', x=10048.08, y=49.01, z=2063.92], ane['Cod'/26994, l='MpServer', x=10064.21, y=60.00, z=1975.71], ari['Zombie'/37746, l='MpServer', x=10027.51, y=12.00, z=2070.82], ane['Cod'/27019, l='MpServer', x=10063.72, y=60.03, z=1978.36], ane['Cod'/27020, l='MpServer', x=10062.93, y=60.04, z=1976.41], ane['Cod'/27021, l='MpServer', x=10063.55, y=60.07, z=1975.32], ane['Cod'/27022, l='MpServer', x=10062.81, y=60.07, z=1974.44], ane['Cod'/27023, l='MpServer', x=10063.61, y=59.93, z=1976.35], ane['Cod'/27024, l='MpServer', x=10062.88, y=59.99, z=1975.81], ane['Cod'/27025, l='MpServer', x=10074.50, y=60.97, z=1970.50], ane['Cod'/27026, l='MpServer', x=10048.79, y=53.97, z=2084.88], ane['Cod'/27027, l='MpServer', x=10049.93, y=53.97, z=2084.44], ane['Cod'/27028, l='MpServer', x=10048.56, y=54.00, z=2085.43], ane['Cod'/27029, l='MpServer', x=10049.15, y=53.98, z=2085.63], ane['Cod'/27030, l='MpServer', x=10049.38, y=53.97, z=2084.91], ane['Cod'/27042, l='MpServer', x=10090.75, y=44.95, z=1978.03], ane['Cod'/27043, l='MpServer', x=10089.96, y=44.97, z=1978.64], ane['Cod'/27044, l='MpServer', x=10090.50, y=44.97, z=1976.52], ari['Zombie'/19877, l='MpServer', x=9987.50, y=20.00, z=2081.50], ane['Cod'/27045, l='MpServer', x=10089.95, y=45.00, z=1977.11], ari['Zombie'/19878, l='MpServer', x=9984.50, y=20.00, z=2080.50], ane['Cod'/27046, l='MpServer', x=10090.02, y=44.98, z=1977.80], ane['Cod'/27047, l='MpServer', x=10089.33, y=45.05, z=1976.46], ane['Cod'/27048, l='MpServer', x=10089.22, y=45.15, z=1977.62], ane['Cod'/27050, l='MpServer', x=10089.98, y=44.97, z=1976.36], ane['Cod'/27051, l='MpServer', x=10082.17, y=57.98, z=1982.42], ane['Cod'/27052, l='MpServer', x=10081.58, y=58.01, z=1981.80], ane['Cod'/27053, l='MpServer', x=10081.48, y=58.16, z=1982.73], ane['Cod'/27054, l='MpServer', x=10088.64, y=44.92, z=1977.93], ane['Cod'/27055, l='MpServer', x=10079.80, y=58.18, z=1980.80], ane['Cod'/27056, l='MpServer', x=10080.89, y=57.94, z=1980.15], ane['Cod'/27058, l='MpServer', x=10079.99, y=58.02, z=1980.13], aqf['Creeper'/28082, l='MpServer', x=10050.50, y=26.00, z=2030.50], ane['Cod'/27059, l='MpServer', x=10080.32, y=58.05, z=1981.44], ari['Zombie'/39868, l='MpServer', x=9957.50, y=19.00, z=2099.50], amy['Bat'/9672, l='MpServer', x=10076.86, y=18.39, z=2072.70], amy['Bat'/18393, l='MpServer', x=10065.52, y=25.46, z=2056.14], aqf['Creeper'/474, l='MpServer', x=10030.50, y=11.00, z=2067.50], aqf['Creeper'/475, l='MpServer', x=10028.51, y=13.00, z=2075.18], amy['Bat'/18396, l='MpServer', x=10058.05, y=27.51, z=2047.75], ane['Cod'/27100, l='MpServer', x=10092.31, y=36.93, z=1960.85], ane['Cod'/27101, l='MpServer', x=10092.84, y=36.97, z=1960.62], ane['Cod'/27102, l='MpServer', x=10092.66, y=37.06, z=1961.80], ane['Cod'/27103, l='MpServer', x=10091.81, y=36.99, z=1960.07], ane['Cod'/27104, l='MpServer', x=10092.58, y=36.79, z=1960.05], ane['Cod'/27105, l='MpServer', x=10091.14, y=36.51, z=1959.47], amy['Bat'/18402, l='MpServer', x=10057.65, y=26.03, z=2044.87], ane['Cod'/27106, l='MpServer', x=10093.17, y=36.98, z=1961.21], ane['Cod'/27107, l='MpServer', x=10093.02, y=37.05, z=1959.97]]

• 24 Creeper

• 11 Skeletons

• 3 Endermen

• 17 Zombies

But the Mob cap https://minecraft.gamepedia.com/Spawn#Mob_cap isn't exceeded. In you world that should be 106 hostile mobs at max.

I've identified the issue. The light level of the blocks is always maxed, no matter how many blocks are above the spawning floors no matter if its day or night.

I think its the same bug that is displayed over in this page of the minecraft bugtracker: MC-129682

... or MC-129725