Anyone else having periodic severe stutters post SU12, despite major CPU/GPU/VRAM headroom?

[Ju1ius2416]

the worst i’ve seen thus far…:

What did you do in MSFS today? (Part 2)

flew from EDDN to Firence, well at least i tried to but the abandond sim wouldn’t quite let me… what a stutter fest. Starts about one hour into the flight. (EDDN from the store, WTT CJ4 mod and CJ4 livery from flgtsm.to, on vatsim, community folder otherwise empty.) [Screenshot_3209]