What happened?

So, when I'm entering Aether for the first time game freezes completely, I still can relaunch the game and join the world, but after that game freezes for about 2 secs every time, new chunks are generating.
I think that the problem is in some optimization mods in my mod pack, but I tested Paradise Lost only with all optimization mods and everything was ok, after that, I give up cuz idk what mod can cause these freezes, maybe you can guys? Pleeease

To replicate:

1. Install my modpack,
2. Enter Aether and try to fly around to load chunks

Mod Version

Beta 1.6.6

Fabric API Version

0.47.10

Relevant log output

https://pastebin.com/wbjPDYEx

Other mods

https://drive.google.com/file/d/1bERdnWWMAx4yR25FQKImND6X2yhNo2RR/view?usp=sharing

Additional Information

No response

Interesting that there is no freezes with TerraBlender but this #630

I think heavy lag

Does it freeze completely or just lag, and does it happen every time?

idk why, but this bug was caused by this #630