Incorrect repeat playback when multiple section breaks are present

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

1. Take the attached score
2. Open in latest main
3. Delete the bogus section break at the title frame
4. Play, notice the playback doesn't work but pauses at the 2nd and subsequent repeats/jumps rather than after having processed them

For some strange reason 4.7.5 is not affected by that.

Problems even happens with just one section break, if the 2nd section ends with a repeat or jump

Supporting files, videos and screenshots

https://github.com/user-attachments/files/31793375/repeats%40section_breaks.zip

See video from https://github.com/musescore/MuseScore/issues/14262#issuecomment-5589349816:

https://github.com/user-attachments/assets/cf900eb8-449e-4733-8770-1c9cb5523917

In which versions of MuseScore Studio is this issue present?

latest main

Regression

I was unable to check, it might have worked with an earlier version of main, some time between now and the merge of #34350, as it still does work in 4.7.5, which had the same fix backported

Operating system

Windows 11, but that hardly matters

Additional context

See https://github.com/musescore/MuseScore/issues/14262#issuecomment-5526873001

Checklist

• This report follows the guidelines for reporting bugs and issues
• I have verified that this issue has not been logged before, by searching the issue tracker for similar issues
• I have attached all requested files and information to this report
• I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible