The bug
Fungus trees grown (naturally or using bone meal) from crimson or warped fungus do not immediately convert the nylium below to netherrack.
Instead it converts on its own after some random time when it notices that a block is above it.
This is inconsistent with regular trees which immediately convert grass to dirt.
How to reproduce
Plant a fungus on the respective nylium
Use bone meal on the fungus to grow a tree
❌ The nylium below is not converted to netherrack immediately
Linked issues
is duplicated by
Attachments
Comments


@@unknown, yes, you are now the reporter. Thanks.

Confirmed in 20w13b.
Uploaded a few screenshots for reference.
Can confirm in 20w51a.
Can confirm in 21w03a.
Can confirm in 1.18.1.
Can confirm in 1.18.2 and 22w19a.
Can confirm in 1.19.
Can confirm in 1.19.2.
Can I request ownership?