So I just started up SE for the first time, and no more than 30 seconds in I started noticing massive glitches in the game's physics. NPCs flying all over the place, walking over stuff throws me into the air etc. What's going on? How do I fix this... ?

turn on vsync 60 hz or cap the frame rate. Maybe set half vsync or half adaptive. I think there's some nvidia driver inspector settings for half vsync. I assume nvidia.