Impossibile to reinstate alterations when in "Input by duration" mode

Issue type

UX/Interaction bug (incorrect behaviour)

Description with steps to reproduce

When using the new "Input by duration" system, it's impossible to write a note with an alteration which is already in key signature and has not been altered inside the measure. For example, in C major you can't write a note with a natural, in F major you can't write a B flat, in G major you can't write F sharp etc.
This is a major issue when you have to reinstate an alteration after a barline, as it is required for a decent readable engraving.
[And I really love this new input mode, it looks way faster then the "Input by note name" mode.]

Supporting files, videos and screenshots

Here's an example in BbM/Gm key.
As you can see, I can't write B flat and C natural after a barline, but only if those notes have been already altered inside a measure.
You can also see in the video how reinstate the alteration is necessary after the barline.

https://github.com/user-attachments/assets/a2886a28-6807-4812-8b15-667e62ba3cc6

What is the latest version of MuseScore Studio where this issue is present?

It's the same in 4.5 and 4.5.1

Regression

No.

Operating system

Windows 11

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