When playing this pack I randomly encounter game freezes where the audio continues and responds to my inputs as if the game is running normally, but the screen is frozen on one frame. If I press escape or e to open a menu I can see my curser moving around, but I can't actually see the menu. If I alt+tab out and then back into Minecraft it becomes an image of the loading screen flickering with black. Closing and restarting Minecraft fixes it. I haven't experienced this with any other pack on this machine, including much heavier packs. It seems to happen way more frequently when interacting with the quantum transmutation chamber, but it happens other times too.

This appears to have been resolved in the Discord. Closing here.

It actually wasn't resolved I just sorta gave up. Someone suggested it had to do with the newest java version having issues with minecraft 1.16, but I wasn't able to get multi mc working so I could try a different java version, and I haven't had this issue with other 1.16 packs, so I don't think that's the issue anyways.