While NOT A FIX, I was able to get past the eye stuttering issues with eye tracking by going into Pimax software / device settings / device, and then simply disabled 'Eye Tracking' by unchecking it. Loss of performance obviously but no longer game braking.
Btw, turning off DFR in the 'Games' tab of the Pimax software did not resolve the issue for me but the above method bypassed the issue so to speak.
Playable until there's a patch. However, an entirely separate issue of freezing frame for 10-20 seconds every 5 mins or so did crop up.
