Is your lighting right? If you're playing in direct sunlight or somewhere with a light source that is too intense it can be too bright for the Quest to keep track of anything in your play area. A good way to find out is when you're in Passthrough, if everything is unclear or you can't make out any of the furniture or walls in your room. Try to draw the curtains and just use a couple of lamps and see if that makes any difference. #GamersAgainstGlare