All I can say is I don't get this issue, and I have the same media.
However, the closest thing I can think of related to your situation was when I slapped a shader on a non shadered segment. Because I'm still figuring out shaders and customisation on those fronts I must have done something wrong. I had a similar issue where the wall lit up on certain angles.
I don't know if the above is even relevant (probably just me not doing segment shaders properly) so there's not a lot I can say. But because it works for me, there must be a difference causing the issue. Are all the files there? Have you tried re-downloading? Just some thoughts.

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