Hi, with the newest version some things are looking like that:
same for chests, some leaves in a biomesoplenty biome or some other stuff i guess.
it works fine with sihywtcamd-1.10.3+1.21.jar

My client log if needed:
https://gist.github.com/pewblaze/b5ce0ec9552edb70c5a742de7ad6b5d3

So i updated a few mods in the meantime & the waterlogged stuff is gone. sorry about that! cant say which mod triggered this but its fine now :D

Hi, thanks for the report. What am I looking at exactly, are you talking about blocks not waterlogged?

I will check that asap. There is really no reason for such a change in this new version, but I may have missed something

Yes also chests are waterlogged in structures or some leaves in a bop biome. its really weird. ive got a lot of mods, so it also could be a incomp. with another mod but just wanted to let you know :)

Mmh I wasn't able to reproduce with my mod alone. Are you sure the issue is my mod? Did you try to reinstall the previous version to see if you still had the issue?