This seems to have been introduced with the last patch; I don’t recall this occurring in previous patches. When not looking directly at a beacon boundary that is the boundary of 2 adjacent beacons, the beacon boundaries start z-fighting.
(hard to capture as a single image)
Frame 1:
Frame 2:
If I’m looking at the boundaries (“looking” being the middle of my screen targeting the boundary), the z-fighting does not occur. This includes through glass.