Flickering visibility for telescope and meteor detector

My telescope and meteor detector report arbitrary visibility values. They are somewhat limited by the tiles, but at no point should either of them report 0% quality. The values are flickering rapidly and there is nothing in the sky that would explain it. Looks so weird that it may be memory-related, something like uninitialized memory being used for a cache that isn't fully cleared.

I'm attaching a save, though I'm not sure how useful could it be.

Spacestation.sav