VR fixed shadows translate depending by camera distance

I'm curious at what's causing this glitch here: the light pole shadow moves up or down depending by the camera distance; there is also a square shadow under the bridge acting similarly (might need fullscreen to see it). Other realtime shadows in the scene behave the same way. Those objects are static of course.

Direct feed from Oculus Quest, Unity 2019.3.0, URP 7.1.8, also the light pole is part of a single big mesh that has all the light poles in it.
I don't think this is a bug, rather the result of some approximation, but I'm pretty curious regardless.