When switching between accounts in the same Minecraft world (especially in local singleplayer or LAN-hosted sessions), previously spawned slimes may disappear or fail to persist. This happens even if the slimes were present and active before the account switch.
Steps to reproduce:
Launch Minecraft and log in with Account A.
Enter a superflat or slime-spawning world and locate slimes.
Exit the world and log out from Account A.
Log in with Account B and open the same world.
Slimes that were previously present are now gone, even if they should persist naturally.
Expected result:
Slimes that were present before account switch should still exist in the world.
Actual result:
Slimes are no longer present after switching to another account, even though other mobs may still be there.
Additional notes:
This issue was observed in 1.21.7 and next versions with both online and offline mode.
The bug does not appear to affect passive mobs or named mobs.
We do not have enough information to find the cause of this issue.
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This issue is being temporarily resolved as Awaiting Response. Once the requested information has been delivered, the report will be reopened automatically.
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