[2022] I'm experiencing a weird pants-related bug.

Can you do a test install of the game on any other computer you have access to, and test this there? That way you can decisively determine if this is indeed an issue confined to this machine or not.  

Unlikely, hard to see how. Either you are still installing mods, or this is a game bug.  

We don't move threads into Bug Reports, because when you post a new one there there's a form the QA team need you to fill out for more details.