TLDR: "Color Precision" graphics setting is causing the bug. Turn the setting to Medium to fix the problem.
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There is a lighting bug that has been effecting reflections for a while now.

In the most recent patch the effect has greatly diminished but is still prevalent.

It looks like cop car siren lights (cop lights, cop siren, siren lights, police lights, police siren lights, police siren) in the top left of the screen.

It only happens to glass textures that have another piece of glass...

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