All glissandos got deleted

[stevage]

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

At some point while working on my score, every glissando (there are quite a few) disappeared. They are in quite a few different instruments, at various places across the 151 bar score. I don't know the exact moment they got deleted.

I'm not aware of having done anything to trigger this. I don't think I was doing anything on glissandos at all when this happened (hence why I'm not sure exactly when it occurred).

As far as I know, no other elements have disappeared this way.

I have experienced this at least twice now in the same score, but it's an unpredictable, as yet irreproducible occurrence. Sharing this in the hope that other people who may also have occasionally experienced this can contribute information.

Supporting files, videos and screenshots

n/a

In which versions of MuseScore Studio is this issue present?

OS: macOS Sequoia (15.7.7), Arch.: arm64, MuseScore Studio version (64-bit): 4.7.4-260706075, revision: github-musescore-musescore-7688c00

Regression

I was unable to check

Operating system

macOS

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

[avvvvve]

This one might be hard to address without more info. There are some fixes related to spanners coming in 5.0 that could potentially help. In the meantime, feel free to attach your score if you are comfortable doing so.

[MarcSabatella]

A common source of problems like this is time signature changes or similar operations that basically involve MuseScore rewriting measure(s). Certainly in cases where the rewrite involves the second note of the gliss but not the first, it's easily reproducible. For example, changing the time signature of the second measure here:

The "regroup rhythms" command will remove all glissandi and a number of other elements too; see #18127

[stevage]

Thanks, that's pretty useful to know. It's certainly possible that time signature changes or regrouping rhythms are relevant here.

Actually now that I load a "before" version and apply "regroup rhythms", I can see that yes, it immediately deletes all (I think) of the glissandos. Eg:

So it seems pretty likely that I have accidentally done that here. (I do use that command, but normally applied to small selections, not the whole piece).

[davidstephengrant]

@stevage @MarcSabatella Thank you both. I've increased the priority of #18127, and will close this as duplicate.