Certain tempo marking can't be added to custom palette

[Gargantuar314]

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

1. Go to a newly created palette ("My palette" in the video).
2. Go to "More" and switch to "Tempo" to add tempo markings.
3. Choosing "Quater note = 80 BPM" and then "Add to my palette" doesn't work.
4. Markings like "Half note = 80 BPM" and "Eighth note = 80 BPM" can be added, but are displayed wrongly (compare to the "Tempo palette").

Expected behaviour: the "Quater note = 80 BPM" marking can be added, and the formatting of all tempo markings are the same as in the "Tempo" palette.

Also, AFAICT, this problem doesn't happen with other types of markings.

Supporting files, videos and screenshots

recording_2025-10-19_17.25.41.mp4

In which versions of MuseScore Studio is this issue present?

4.6.2

Regression

I was unable to check

Operating system

Arch Linux x86_64

Additional context

I'm using the official AppImage from the website. Also, I'm using Sway 1.11.0 (Wayland) as my compositor.

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]

Wayland doesn't work well with MuseScore in lots of ways, unfortunately, which is why it is disabled unless you set a special experimental environment variable. But for the record, the above does work under xcb.

[Gargantuar314]

Interesting. I should note that this in fact works in the nightly build (4.6.3 from the 19th Oct 2025).

What about the formatting of icons @MarcSabatella ?

[MarcSabatella]

I'm not sure what you mean about formatting of icons. Are you referring to the fact that if you add a tempo marking to a custom palette, the scaling is too large to fit the whole marking in a cell? There seems to something special about tempo markings, maybe because they are composed of characters from multiple fonts? Not sure, but it seems like a bug. Note that if you add a tempo marking to your score and then to your palette (instead of adding directly from the More section of the palette itself) it seems to work more normally.

[Gargantuar314]

Exactly what I meant @MarcSabatella .

[FrancRos31]

I'm not sure what you mean about formatting of icons. Are you referring to the fact that if you add a tempo marking to a custom palette, the scaling is too large to fit the whole marking in a cell? There seems to something special about tempo markings, maybe because they are composed of characters from multiple fonts? Not sure, but it seems like a bug. Note that if you add a tempo marking to your score and then to your palette (instead of adding directly from the More section of the palette itself) it seems to work more normally.

This was reported here: #26271.