Impossible to add lyric hyphens between bars when using multiple repeat voltas

[marcdir]

Issue type

Engraving bug (incorrect score rendering)

Description with steps to reproduce

After consulting Lyric hyphens disappearing in continuous view
#30284 , still experiencing hyphen issues, when using multiple 1. and 2. voltas.

Supporting files, videos and screenshots

First example :

With 1. volta, it is impossible to put an hyphen between «Sei» and «gneur». However, the hyphen under 2. volta is working properly :

If I remove the 1.volta, I can put the hyphen normally, but it breaks the hyphen under 2. volta :

Two demo scores are also included. After the second 1. volta, no hyphen can be entered between bars :

Scores.zip

Deleting the 1. volta solves the problem on the first staff but messes up the next one :

Video here : https://solfegiator.ch/serv/index.php/s/WnEBzW6LSqXa6Y5

In which versions of MuseScore Studio is this issue present?

Experienced on all MuseScore 4.6.x version

Regression

Yes, this used to work in a previous version of MuseScore 4.x

Operating system

Mac OS Sonoma 14.8.2

Additional context

No response

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

[MarcSabatella]

I can confirm the problem in this score, but I also note, the repeat structures don't make sense here - there are end repeats without start repeats, voltas without end repeats, etc. If I fix those problem, the hyphenization works. So I'm guessing the issue is triggered by not being able to construct a valid repeat map. Still a bug, of course.