Sorry for the delay as I never noticed the problem until tonight. The bug is fixed and should be good for future versions. (knock on wood)
Some minor improvements you may or may not notice are: - Snow generation now calls the BlockFormEvent. (helps compatibility with world guard keeping snow out)
- Snow blocks and snow layers don't kill grass. (No more dirt under the beautiful snow)
- 1.16.3+ support until Mojang breaks it again.