Slur lost in full score + volta causes Crash

[mercuree]

Issue type

Crash or freeze

Bug description

In parts if you copy/paste 2-measure slur into single measure (before multi-measure rest), this slur will be saved in part only.
This broken slur with conjuction of Volta makes Musescore crash if you try to make second instrument visible in parts.

This issue is based on crash report from musescore.org
Also maybe related to #21242

Steps to reproduce

Slur lost:

1. Create score with two instruments
2. Fill one measure with eight notes
3. A a few measures fill two measures with quarter notes and add single slur for them
4. Open first instrument part and copy slur to measure with eight notes. Adjust slur so it fits well.
5. Save, close and open score again
6. Slur is lost in main score, but present in part.

Crash

1. Add Volta after measure with eight notes
2. Go to parts and make second instrument visible
3. Crash

Screenshots/Screen recordings

Slur lost:

slur_lost_full_score.mp4

Crash:

slur_lost_volta_crash.mp4

MuseScore Version

Musescore 4.0.2, 4.2.1, 4.3.0, 4.4.0 master

Regression

I don't know

Operating system

windows 10

Additional context

No response