Extra key signatures are created for multimeasure rests in part when undoing
Linux. Affects 2.0.3. Not sure about master since #108086: Unexpected clefs and key signatures are shown in parts
Result: an extra key signature appears for the multimeasure rest
Expected: no extra key signature
This bug is probably because of the generated key signature of a system in the score and, somehow, the undo.
For steps 3-4, even just undoing and redoing causes the extra key signature to appear.
Doing something twice then undoing twice (and repeat) can also lead to even more key signatures being added, leading to this in the part:
This effect doesn't seem to survive reload.