Performance Issues post May 8 Patch (Cam Jittering, Sub 60 FPS)

[Sim]

After the May 8 patch, looking around is insanely jittery, and my FPS have dropped from capped 60 to 40-ish. Video details have remained the same.

Edit: After some people posted around on the forums, it seems the culprit is FSR2.
Edit 2: Disabling FSR2 and switching to Stretch fixes the model jittering and some FPS issues, but there's still jittering in the models away from the player, a very faint one.

 

[Playeroth]

can confirm, in sandbox before update i had 120fps but now i get 60-70

 

[supremejester28]

Same

 

[Vih]

AMD FSR is making my game slower than native.
Before the patch: 120 fps stable
Now: 50 fps with drops.