Same issue here (Quest 2 via link, 8700K, RTX 2060S, 32GB RAM, SSD). I get what looks like a single bad frame every 1-3 minutes (I would guess) and it disappears so quickly my brain doesn’t have time to see exactly what it displays but it looks like the camera position/angle suddenly jumps somewhere wildly incorrect before returning to normal (and it’s really distracting).
I’m pretty sure I remember having the same issue years ago in FSX when using TrackIR. Could there be some old piece of legacy code in the sim which accidentally overwrites the correct head position and angle occasionally? Maybe the devs could add some constraints to filter out physically impossible changes? (e.g. if head orientation or position changes by more than x degrees or y cm from frame to frame).