When playing on cosmodrome (that is the only map I have played on in PTS 13.5) the textures seem to disappear in layers in certain parts of the map. See the video.
Strange texture disappearing (13.5)
https://forums.focus-home.com/topic/59150/some-kind-of-bug-that-is-hard-to-describe-13-5
Seems to be a bug with the ZiKZ