Whenever sprinting across slabs I immediately crash due to a failure in particle generation. I'm not sure if this is a Full Slabs issue or a Visuality issue, I'm posting on both.

Can you provide crash log? I cant reproduce myself

Of course.

https://pastebin.com/dCvByFuP

Seems like full slabs trying to call method that doesnt exist, try to downgrade to 3.3.7 https://www.curseforge.com/minecraft/mc-mods/full-slabs/files/4462750

Oh, I will try that thank you!