The Bug
If a cave spider spawner happens to be in a mineshaft section that a trial chamber replaces, the mineshaft gets replaced as expected, but the cave spider spawner remains, leaving an out-of-place spawner.
How To Reproduce
Start a new world in Java Edition 1.20.5 using this seed: 3057310577815726585 (with 1.21 Experiments enabled).
Run this command to teleport directly to the spawner once spawned into the world:
/tp @s 9 -27 304
Take note of whether a cave spider spawner is near you in the trial chamber. Also, note that the trial chamber replaced a mineshaft near the cave spider spawner.
Expected Behavior
As the rest of the mineshaft has been replaced by the trial chamber structure, the cave spider spawner would be replaced too.
Linked issues
duplicates 1
Attachments
Comments 2
Thank you for your report!
We're tracking this issue in MC-270575, so this ticket is being resolved and linked as a duplicate.
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Sorry, just found out this is a duplicate of MC-270575.