Kodi doesn’t keep full screen resolution

I have a QHD+ screen with a native resolution of 3820×1800. I set the full screen resolution to 1920×1080 in kodi, but it always looses that setting and returns to 3280×1800. Kodi also auto-minimizes a lot while videos are paused and when I return to full screen mode the resolution is 3280×1800 again. Is this a bug? Thank you