It seems that sometimes modified blocks by the decorators are not sent to the client, if these modified blocks are in different chunks. Why exactly this does not happen is currently not exactly clear. One possible reason might be that the decorator is modifying blocks in chunks that have not completed their generation.
The image below shows the problem:
Placing blocks at the locations where the mushroom blocks are supposed to be, will trigger an update for that block:
Rejoining the server will fix this visual glitch entirely:
In GitLab by @JimVliet on May 15, 2020, 12:10
It seems that sometimes modified blocks by the decorators are not sent to the client, if these modified blocks are in different chunks. Why exactly this does not happen is currently not exactly clear. One possible reason might be that the decorator is modifying blocks in chunks that have not completed their generation.
The image below shows the problem:
Placing blocks at the locations where the mushroom blocks are supposed to be, will trigger an update for that block:
Rejoining the server will fix this visual glitch entirely: