Every time I turn towards this wall/window, the Quest immediately loses all tracking and loses track of the Guardian, forcing me to set it up again. However, as soon as I turn towards any of the other 3 walls in the room, the Guardian gets recognized and tracking immediately starts working again. I've set up the room with Guardian, and have not had an issue in this room before v16.
your room is too bright in the window area, your room needs to be evenly lit... so if your the 3/4 of your room are at the same lighting level everything is fine but as soon as you turn and face the window the light changes too much and oculus looses it sh*T, hence you get thrown back to drawing a guardian again.