Shadow error with Union

I’ve noticed that whenever I create a single Union Operation — even one made of just a few parts — an opaque shadow appears for some reason, even though nothing is causing it. I want to clarify that this behavior certainly didn’t happen before.
I had to run various tests to see if the behavior recurred in other projects, and it seems it does.

Beta Features - all functions activated long before this bug - but even after disabling some functions that could be the cause, the problem still persists

Expected behavior

Expected Behavior: Create the Union normally, ensuring that no strange, random shadows appear on the different faces of the part.
Somehow, if you press the Union button twice and then the Negate button just once, the shadows disappear, restoring the expected visual result.

Although this can happen randomly, it seems to occur on any baseplate other than the one used previously.

  • No plugins or corrupted custom materials were used at any point.
  • (And no, the sun’s position doesn’t cause it either; I ran several tests for that as well.)
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