Describe the bug you're experiencing

When better chunk loading is installed, some blocks appear to be generated only on the client in places where they are not originally generated. (just like the Minecraft bugs of the past...)
It is noticeable in mushrooms and rare in short grass and small flowers.
They disappear when the block is updated.

Reproducability

Look at swamp biome.

Mod up to date

• Before submitting this issue I updated to the newest version and reproduced it

Minecraft version

1.21.1( also 1.21 / 1.20.1)

Modloader version

NeoForge-21.1.31

Logs

https://gist.github.com/Mechalopa/cd240f1597e06aec775d5da7807b7490

fixed in the newest