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Done again.

Did you drag them/rotate them with the arrow/circles. Did you use the snap tool? Did you use the transform panel?
Can you make a screenshot of the panel called "transform" between "Object" and "Move" with the part selected so that I can see the values.
I already noticed it in the past for special cases but I am unsure of the root cause.

I make some try, I use the arrow to make the rotation.
But when you make a rotation (brick part 2357, medium grid), first rotation, you have 45° (perfect), but next you don't have 90°, I have 89.980° (Y axis).
Maybye that's the problem. I f I continue the rotation, I have didn't have again the good value.

I try the same build, but I make the rotation with the transform panel, putting manually the good value.
And this work perfectly.
So I think there is a small bug when you make rotation with the arrow.

Issue has been fixed.

Thanks

Thanks!