Happens at several stations at Hauptstrecke Rhein-Ruhr but screenshot below shows Essen Hbf which has a lot of these very bright spotlights, even shining through the roofs. The lights are so bright they're even clearly visible during a sunny day.
This issue is not limited to the Windows version, but also occurs on my PS4 Pro. At the station "Essen-Kray Süd" this beam of light is located directly on the tracks and even shines through the ground. It's visible on the ceiling and floor of the pedestrian underpass.
I have just seen the same weird lights on MSB. I can't even imagine what kind of mistake caused this, but I definitely want it fixed!