Avoid glitched blocks
Glitched blocks in some areas/custom worlds
config.ymland set this option:
Another solution is to avoid using
REALcustom blocks type (mushroom) and use
REAL_NOTEcustom blocks type.
REAL_NOTEuses Noteblocks to create custom blocks, so you won't have this issue because they don't naturally generate around the vanilla world.
Enable these options in purpur.yml configuration: