While flying in VR I occasionally I get the feeling of “floating” in the cockpit, usually in a small GA such as a 172. It is more of a back and forth feeling of floating. I currently have a PiMax Crystal. Running on an i9 11th gen and 4070ti super.
This used to happen to me when I had a G2 and the fix was to clear the WMR environment data.
I occasionally get a similar experience on my Reverb G2, sometimes the headset looses it’s spatial tracking & floats or jumps a little until it sorts itself out, this happens more often in lower light situations. My room/simpit situation is not ideal at the moment & it has been happening more since I reduced the size of my monitor screen.
Like others have said, I can be indeed a tracking issue.
Another issue was when I still left the VR mirror on my screen, visible for the headset. My monitor is an ultra-wide and the headset was picking up the motion from the screen as actual headset motion cues, thus counteracting my head movements. It led to situations where I was trying to peak over the nose of the aircraft, only to have the headset correct back to my original position.
I get it with the Pimax Light. The Pimax tracking seems to be really sensitive to room surroundings. One thing to try, is tap your HMD to access the pass-through cameras (which are also tracking sensors) and see if you get any instability as you pan around. Sometimes even an LED light on the computer, or mouse can create pulsing light.
I am still optimizing my game room, its tricky, but hopefully Pimax will keep working on theoir tracking algorithms.