That's an odd one there, didn't know about the jumping one, but for me when I get caught while picking an item up it just breaks the wolf ai, so I'll look into why it gives different results.
There have been a few bug reports about situations that freeze the player, but I've not yet been able to identify what causes them, but it's on the list.
I'll add the clothing menu crash to the list, but there's an inventory overhaul coming in Phase 2, so I'll probably put that as a minor bug unless it comes up as a frequent issue. Tasks/bugs and progress are here: https://trello.com/b/1D2c3Pan/running-of-the-wolves
So, thinking about some of the issues you're having, it could be down to Nanite and Lumen. I believe both of those use Dx12. In theory if Dx12 isn't available, it should just not use either nanite or lumen which would lead to levels being loaded being way chunkier than they should be. Nanite is the main one though, cos it reduces the level of detail on objects further away, but if nanite can't work it would mean everything is displaying at full quality.
One possible thing to try could be dropping the quality in options. That might force the game to use a lower Level of Detail without nanite.