Note
If you are still experiencing this issue in version 1.16 or later, please comment below and indicate if the problem is with slime spawning in a swamp or in a slime chunk, and give the coordinates and world seed.
When in a swamp or a slime chunk, I observe a slime and create a simple farm with appropriate lighting, Y-coordinate, and conditions according to the Minecraft.Wiki website. I have built these farms (iron golem + cactus) before, prior to this update without problems. However, slimes cease spawning in either the chunk or the swamp after I start digging out the area. In the case of the swamp, I have several AFK spots to just observe what happens in the swamp - no farms or lighting. Slimes do not spawn. I have observed from varying Y-coordinates as well but there does not seem to be any distance from the player at which a slimes will spawn.
My husband and I both experience this issue on our separate platforms and devices. We play on Realms but this issue persists if I create a Realm download (both on normal and hard difficulties). My husband plays on Windows 10 PC, Minecraft v. 1.14.4 and I play on iPad, Minecraft v. 1.12.0.
We have tested and observed this issue for one week and we play for about 4-5 hours every day after work...In my case, this amounts to at least 20 hours of testing and observing various environments, Y-coordinates, farms and lack of farms, locations, etc. I should stress that this issue persists even when there is no golem or lighting and the only factor I can control which would affect slime generation is the distance between myself and the slimes.
*This may be a duplicate of MCPE-48950 which contains two bugs in one ticket.
Linked issues
is duplicated by 7
MCPE-48950
Slimes not loading in slime chunks/No Illagers
Resolved
MCPE-50988
Slime Chunks – no slime!!
Resolved
MCPE-57253
apparent slime chunk is not spawning slimes
Resolved
MCPE-59763
Slimes not spawning in Slime Chunks in Realms
Resolved
MCPE-60443
Slime spawning issues PS4 bedrock.
Resolved
Attachments
Comments 8
I believe that many slime Chunks as calculated by tools really are normal Chunks. I now have tunnels and openings for thousands of blocks and only seen slimes spawn in 2 or so Chunks. Mined out a 4 chunk space from y7 to y40 where mapping tools agreed there should be slimes. None have ever spawned for example. Ground level and adjacent caves torched for 64 blocks each way too. For the nearest working chunk to spawn I can run in and out and 1 to 3 slimes will spawn pretty reliably and keep respawning. Caves torched here too, but never killed every last overworld mob where it is working...
Overall impression is there a way fewer operational slime chunks than expected, regardless of mapping tools not identifying them accurately.
Have you spawn-proofed all of the caves in the density check area (4 chunks in every direction for 9-chunk square) around your slime farm? Have you checked for pools of drowned in that area too (surface zombies that convert to drowned count against the cave monster cap, see MCPE-61721).
(world download above)
I made a world with the same seed as my survival world and cleared out the chunk. 3 commands in command blocks were used:
/kill @e[type=!slime],
/execute @e[type=slime] ~ ~ ~ setblock ~ ~-1 ~ glowstone,
/kill @e[type=slime].
With these commands, the surface and cave cap would be completely empty. However, no slimes spawned in the slime chunk hollowed out to y 30 .
That same slime chunk spawned slimes in a super flat world. I'm not sure if this bug is platform specific but I am experiencing this on iOS.
@Saw Shi Yang thanks for the world! The reason slimes are not spawning in that slime chunk in that world seed is because of a bug that prevents any monster except surface strays from spawning in the snowy tundra biome. You may wish to add a vote and follow MCPE-17651.
I have not been able to reproduce any of @unknown's claims, so I have removed his comment to prevent confusion. I think he may have been testing on Java Edition.
Hello, I just dug a chunk in my survival world to make a slime farm but it appears to not spawn slimes, it is in a slime chunk, im on version 1.16.220
I have had similar experiences and also seen comments on YouTube of users creating these slime spawners and going back multiple times and nothing occurring.