Can't separate dotted eighth note from eighth note pair in 2/2 without setting the second eighth to No Beam

[DaddyLudwig]

Issue type

UX/Interaction bug (incorrect behaviour)

Bug description

As I was working on transcribing a Schubert overture, I noticed that something wrong was going on with the beams, namely I could not separate the dotted eighth on beat 1.5 from the eighth on beat 1.25. As far as I'm aware, this is not supposed to happen, indeed, I'm pretty sure the dotted eighth is supposed to break the beam automatically, but it should at least be able to be broken manually without breaking the beam for the note before it as well.

I'm fairly certain that this is a regression from a previous version of MuseScore 4.

Steps to reproduce

1. Set the time signature to 2/2
2. Input 2 eighth notes followed by a dotted eighth and a sixteenth on the first half note beat
3. Try to break the beam at the dotted eighth
4. Notice that the beam doesn't break
5. Set the second eighth to No Beam
6. See that now the dotted eighth is separated out, but the 2 eighths that are supposed to be beamed together aren't anymore

Screenshots/Screen recordings

https://github.com/musescore/MuseScore/assets/6530761/06f7c8d6-d87d-456e-80ce-07eba836793f

MuseScore Version

MuseScore Studio 4.3.0

Regression

Yes, this used to work in a previous version of MuseScore 4.x

Operating system

Windows 10

Additional context

Only occurs in the time signature of 2/2 as far as I'm aware.

[DaddyLudwig]

And of note, if it's 4 eighth notes, I can break the beam at beat 1.5 if I want to, it's only when dotted rhythms are in the mix that this happens. Might also be related to the fact that I have a quarter note pickup at the start of the 2/2 section, though I'm not sure on that.