Hello,
I had the same issues. the FPS was horrible. I have a i9-14900k 48 DDR5 RAM and a 3070. For me what it worked was to put to OFF the option NVIDIA Reflex Low Latency… Im at 40 FPS stable now in High-End settings! Also in Nvidia App dont forget to put to OFF the Latency option! I couldt fly with the Fenix. Now im smooth and stable! Give it a try and tell me if it worked!
Happy flying, cheers mate!
EDIT:
False alarme. I thought it was good but after a few minutes the problem came back 