I've had this happen several times in the past couple days - if taking the headset off and setting it down for a minute, putting it back on leads to a serious height/sink issue in game. Best way to describe it - when I took my headset off, I was still 5'11"... I put my headset back on 2 minutes later, I was more so around 1 foot... and couldn't use any menus. They're too high and everything in the game is happening way above me. Pausing to reset view did not work either - only fix so far is to disconnect Oculus and put back on. AMD 2600X w/ GTX 1660ti.