Problem with command block!

Which command are you using?

All, eg: summon falling_block ~ ~1 ~ {BlockState:{Name:stone},Time:1,Passengers:[{id:falling_block,BlockState:{Name:redstone_block},Time:1,Passengers:[{id:falling_block,BlockState:{Name:activator_rail},Time:1,Passengers:[{id:command_block_minecart,Command:"gamerule commandBlockOutput false"},{id:command_block_minecart,Command:"/fill ~7 ~-2 ~ ~1 ~-1 ~11 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~2 ~-1 ~8 ~6 ~-1 ~10 minecraft:water hollow"},{id:command_block_minecart,Command:"/fill ~2 ~-1 ~1 ~6 ~-1 ~3 minecraft:air hollow"},{id:command_block_minecart,Command:"/fill ~2 ~-1 ~3 ~6 ~-1 ~3 minecraft:water hollow"},{id:command_block_minecart,Command:"/fill ~2 ~-1 ~1 ~6 ~-1 ~2 minecraft:farmland[moisture=7] hollow"},{id:command_block_minecart,Command:"/fill ~2 ~ ~1 ~6 ~ ~2 minecraft:wheat[age=7] hollow"},{id:command_block_minecart,Command:"/fill ~2 ~-2 ~3 ~6 ~-2 ~3 minecraft:sea_lantern hollow"},{id:command_block_minecart,Command:"/fill ~2 ~-1 ~4 ~6 ~-1 ~4 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~1 ~ ~11 ~1 ~ ~11 minecraft:jungle_leaves hollow"},{id:command_block_minecart,Command:"/fill ~2 ~ ~11 ~2 ~2 ~11 minecraft:oak_fence hollow"},{id:command_block_minecart,Command:"/fill ~3 ~ ~11 ~5 ~ ~11 minecraft:jungle_leaves hollow"},{id:command_block_minecart,Command:"/fill ~7 ~ ~11 ~7 ~ ~11 minecraft:jungle_leaves hollow"},{id:command_block_minecart,Command:"/fill ~6 ~ ~11 ~6 ~2 ~11 minecraft:oak_fence hollow"},{id:command_block_minecart,Command:"/fill ~1 ~ ~3 ~1 ~2 ~3 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~2 ~ ~3 ~2 ~2 ~4 minecraft:spruce_planks hollow"},{id:command_block_minecart,Command:"/fill ~6 ~ ~3 ~6 ~2 ~6 minecraft:spruce_planks hollow"},{id:command_block_minecart,Command:"/fill ~7 ~ ~3 ~7 ~2 ~3 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~2 ~ ~6 ~6 ~2 ~6 minecraft:spruce_planks hollow"},{id:command_block_minecart,Command:"/fill ~2 ~ ~3 ~6 ~ ~3 minecraft:spruce_planks hollow"},{id:command_block_minecart,Command:"/fill ~3 ~1 ~3 ~5 ~1 ~3 minecraft:gray_stained_glass_pane[east=true,north=false,south=false,waterlogged=false,west=true] hollow"},{id:command_block_minecart,Command:"/fill ~7 ~2 ~ ~1 ~2 ~ minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~7 ~2 ~7 ~1 ~4 ~7 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~1 ~2 ~1 ~1 ~2 ~7 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~7 ~2 ~1 ~7 ~2 ~7 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~2 ~2 ~4 ~2 ~2 ~4 minecraft:crafting_table hollow"},{id:command_block_minecart,Command:"/fill ~2 ~2 ~3 ~2 ~2 ~3 minecraft:chest[facing=east,type=single,waterlogged=false]{Items:[],Lock:\\\"\\\"} hollow"},{id:command_block_minecart,Command:"/fill ~2 ~2 ~6 ~2 ~2 ~6 minecraft:chest[facing=east,type=single,waterlogged=false]{Items:[],Lock:\\\"\\\"} hollow"},{id:command_block_minecart,Command:"/fill ~6 ~2 ~1 ~2 ~2 ~2 minecraft:spruce_slab[type=bottom,waterlogged=false] hollow"},{id:command_block_minecart,Command:"/fill ~6 ~2 ~1 ~3 ~2 ~6 minecraft:spruce_slab[type=bottom,waterlogged=false] hollow"},{id:command_block_minecart,Command:"/fill ~2 ~2 ~5 ~2 ~2 ~5 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~3 ~ ~4 ~3 ~2 ~4 minecraft:ladder[facing=east,waterlogged=false] hollow"},{id:command_block_minecart,Command:"/fill ~6 ~2 ~6 ~6 ~2 ~6 minecraft:light_blue_bed[facing=east,occupied=false,part=head]{} hollow"},{id:command_block_minecart,Command:"/fill ~5 ~2 ~6 ~5 ~2 ~6 minecraft:light_blue_bed[facing=east,occupied=false,part=foot]{} hollow"},{id:command_block_minecart,Command:"/fill ~5 ~ ~5 ~5 ~1 ~5 minecraft:furnace[facing=west,lit=false]{CookTime:0s,BurnTime:0s,Items:[],RecipesUsedSize:0s,CookTimeTotal:0s,Lock:\\\"\\\"} hollow"},{id:command_block_minecart,Command:"/fill ~5 ~ ~4 ~5 ~ ~4 minecraft:chest[facing=west,type=single,waterlogged=false]{Items:[],Lock:\\\"\\\"} hollow"},{id:command_block_minecart,Command:"/fill ~1 ~4 ~ ~1 ~4 ~7 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~7 ~4 ~ ~7 ~4 ~7 minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~7 ~4 ~ ~1 ~4 ~ minecraft:quartz_block hollow"},{id:command_block_minecart,Command:"/fill ~2 ~ ~5 ~2 ~ ~5 minecraft:oak_door[facing=east,half=lower,hinge=right,open=false,powered=false] hollow"},{id:command_block_minecart,Command:"/fill ~2 ~1 ~5 ~2 ~1 ~5 minecraft:oak_door[facing=east,half=upper,hinge=right,open=false,powered=false] hollow"},{id:command_block_minecart,Command:"/fill ~1 ~3 ~ ~1 ~3 ~ minecraft:gray_stained_glass_pane[east=true,north=false,south=true,waterlogged=false,west=false] hollow"},{id:command_block_minecart,Command:"/fill ~7 ~3 ~ ~7 ~3 ~ minecraft:gray_stained_glass_pane[east=false,north=false,south=true,waterlogged=false,west=true] hollow"},{id:command_block_minecart,Command:"/fill ~6 ~3 ~ ~2 ~3 ~ minecraft:gray_stained_glass_pane[east=true,north=false,south=false,waterlogged=false,west=true] hollow"},{id:command_block_minecart,Command:"/fill ~1 ~3 ~1 ~1 ~3 ~6 minecraft:gray_stained_glass_pane[east=false,north=true,south=true,waterlogged=false,west=false] hollow"},{id:command_block_minecart,Command:"/fill ~7 ~3 ~1 ~7 ~3 ~6 minecraft:gray_stained_glass_pane[east=false,north=true,south=true,waterlogged=false,west=false] hollow"},{id:command_block_minecart,Command:"/fill ~2 ~4 ~1 ~6 ~4 ~6 minecraft:quartz_slab[type=top,waterlogged=false] hollow"},{id:command_block_minecart,Command:"/fill ~6 ~2 ~4 ~6 ~2 ~4 minecraft:chest[facing=west,type=single,waterlogged=false]{Items:[],Lock:\\\"\\\"} hollow"},{id:command_block_minecart,Command:"/fill ~6 ~2 ~5 ~6 ~2 ~5 minecraft:bookshelf hollow"},{id:command_block_minecart,Command:"/fill ~6 ~2 ~5 ~6 ~2 ~5 minecraft:bookshelf hollow"},{id:command_block_minecart,Command:"/fill ~7 ~3 ~8 ~1 ~3 ~11 minecraft:quartz_slab[type=bottom,waterlogged=false] hollow"},{id:command_block_minecart,Command:"execute as @s run summon firework_rocket ~ ~1 ~ {LifeTime:30,FireworksItem:{id:firework_rocket,Count:1,tag:{Fireworks:{Flight:2,Explosions:[{Type:1,Flicker:1,Trail:0,Colors:[I;1973019,11743532,3887386,5320730],FadeColors:[I;2437522,8073150,2651799,11250603]},{Type:1,Flicker:0,Trail:0,Colors:[I;6719955,12801229,15435844,15790320],FadeColors:[I;4408131,14188952,4312372,14602026]}]}}}}"},{id:command_block_minecart,Command:"title @a title {\"text\":\"Холви Дэсмант\",\"color\":\"green\"}"},{id:command_block_minecart,Command:"title @a subtitle {\"text\":\"Модерн Дом\",\"color\":\"gold\"}"},{id:command_block_minecart,Command:"setblock ~ ~ ~1 command_block{Command:\"fill ~ ~-3 ~-1 ~ ~ ~ air\"}"},{id:command_block_minecart,Command:"setblock ~ ~-1 ~1 redstone_block"},{id:command_block_minecart,Command:"kill @e[type=command_block_minecart,distance=..1]"}]}]}]}

Thank you for your report!
We're tracking this issue in MC-145113, so this ticket is being resolved and linked as a duplicate.

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