I’ve seen this mentioned on YT and other places and I have the same problem too…
The horizontal level seems tilted by a few degrees (say, 3 to 5 degrees) on my headset - in the PiMax Play environment. No matter what I do I cannot seem to correct it no matter how much I tilt my head to re-(center / set) the view. Strangely it is usually OK, or not noticeable at least, in most games and their menus but not all, eg: Google Earth and Steam menu is affected to various degress - oddly only sometimes!
It doesn’t seem to matter which module I use in my CS (50ppd or micro-oled) either, they’re affected the same way (equally).
Any ideas why? Solutions? Tweaks?