mushroom block bug

[Angeluuus]

Steps to reproduce

First of all you need a server with worldedit and the buildsystem.
Then you place the block with the ID 99 with worldedit.
It does not matter whether the block is placed with the ID 99 or with a tool in your hand with the command “/repl 99” and right-click.

What is expected?

When you placed the block and leave the world and wait a few seconds until the world is unloaded, the block will be changed to brown_mushroom block. But the block should not change to brown_mushroom block.

What is actually happening?

The block with the ID 99 has changed to 99:14.

https://imgur.com/a/gQXyXvX

Server Info

Server: Paper version 1.21.1-132-ver/1.21.1@b48403b
BuildSystem: BuildSystem version 2.26.1-SNAPSHOT

Any additional comments?

No response

[thomasmny]

Unable to reproduce using Paper version 1.21.1-132-ver/1.21.1@b48403b.
Can you reproduce the issue only using BuildSystem? Also worth noting whether you have any particular settings such as physics disabled