I can now see a trace of the white Pimax logo (the one with stars that displays when the unit is connected but Steam isn’t running) when running games. The logo is causing classic screen burn effects on the panel. I suggest you remove the logo or change it to something darker / moving. If you don’t you’re going to get a lot of returned devices.
You can just replace the image with a dark image yourself. Search your pimax directory for the jpg and replace it. Make sure the image dimensions are the same though !
Nice. I assumed it was baked into the firmware.
You may be able to fix the LCD burn in (unlike OLED burn in).
Here’s a YouTube video that might fix it… “This video is a basic but effective way to help get rid of screen burn in or a stuck pixels on your screen.”