Oculus Quest lost calibration in Big rooms

I am making a game for big rooms (15x15m). Everything works fine for some time (10-30 mins), but suddenly room calibration shifts and player can stuck to wall. Room boundary can be shifted, rotated and floor level can change. Even when I return to point where i start to calibrate room - it does not return to normal. Turning quest off and on don't help. I need to start calibration of room from scratch.