Unstable behavior by beaming over rests

### Issue type Engraving bug (incorrect score rendering) ### Description with steps to reproduce 1. add instruments 2. write rhythms with 16th or 32nd notes with rests in between 3. beam the notes together with the rests 4. the beaming starts to fade away by any change or the rests move unto the notes ### Supporting files, videos and screenshots The beaming over rests needs better functioning consistent framework. It costs so much time to fix everything every time. ### In which versions of MuseScore Studio is this issue present? 4.7.3 ### Regression No. ### Operating system macOS 26 ### Additional context _No response_ ### Checklist - [x] This report follows the [guidelines](https://github.com/musescore/MuseScore/wiki/Reporting-bugs-and-issues) for reporting bugs and issues - [x] I have verified that this issue has not been logged before, by searching the [issue tracker](https://github.com/musescore/MuseScore/issues) for similar issues - [x] I have attached all requested files and information to this report - [x] I have attempted to identify the root problem as concisely as possible, and have used minimal reproducible examples where possible