MSFS 2020 Inconsistent FPS

Yesterday with the Inibuilds A350, I was seeing between 10 - 15 FPS at the gate. I tried restarting the sim and lowering the graphics settings, but nothing helped. I tried the PMDG 737, but the FPS were only slightly better (15-20 FPS). I finally gave up. Today at the same airport, same aircraft I’m seeing 30 to 40 FPS. Is anyone else seeing such inconsistent frame rates?

Yeah. Performance is all over the place. Yesterday it was fine, and today miami was a slide show. It seems every launch i have to change settings. I shouldnt have to chase it like this. I like the good ole days, “set it and forget about it”