The Bug
Parts of a mushroom tree can be replaced with stone from a lava pool. In the screenshots below it shows the Mushroom Stem & Red Mushroom Block being replaced though Brown Mushroom Blocks could also be potentially replaced as well.
Reproduce
Seed: 5468965299839535888
Do /tp @s -500 62 200
Fly to -592 62 264
Attachments
Comments


I was not able to reproduce this issue using the provided seed and coordinates.

Try flying to the coordinates rather then teleporting

It worked now. Can confirm.

Could be fixed by adding mushroom stems and blocks to the #lava_pool_stone_cannot_replace
tag.

In 1.18.2 and 22w19a.