Setting the engine scalability settings to low stopped a lot of the crashes for me. Same with editing settings like LOD bias, etc. By default it’s importing them all at 8k and it just chokes and crashes a lot.
So while I was importing stuff and processing it, I lowered that. After I was done, I put it back up and then it’s fine when you’re actually using them. It just doesn’t seem to be very stable importing/editing the 8k stuff.