Misplaced measure numbers when there are two cutaway staves at the top of each system

Issue type

Engraving bug (incorrect score rendering)

Description with steps to reproduce

Basically, issue #30253 is back, but now only when there are two cutaway staves at the top of system instead of just one.

1. Create a score
2. Add two piano instruments
3. For both staves of the top piano, turn on Cutaway (in the layout panel)
4. Notice measure numbers get placed where the top of the second staff would be if it were not hidden

Supporting files, videos and screenshots

In which versions of MuseScore Studio is this issue present?

OS: Ubuntu 25.10, Arch.: x86_64, MuseScore Studio version (64-bit): 4.6.5-253511702, revision: github-musescore-musescore-653f38d

Regression

Choose option...

Operating system

Kubuntu 25.10 (Questing Quokka)

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

Reproduce the layout using two piano instruments and cutaway enabled on both staves of the top piano, then compare the result with issue #30253. Trace the engraving layout responsible for measure-number placement; done means measure numbers appear at the top of the visible system rather than at the hidden second staff.