Yeah, i think i know what might be causing the issues and it would be a coincidence in that case as i hadn’t been using those particular setups for a while but i’ve been building up some structure around them… with… Forge Microblocks!
Any time i place blocks on a chunk boundary near or in a chunk that has microblocks in it, i get freezes.
So it’s probably related to GT causing a chunk update in a chunk that i’ve now put more than the usual amount of microblocks into.
Oh well, i guess i will just have to remove all microblocks again. And never use them.