Sending the MIDI command "Play" simultaneously activates the playback of all open scores in MuseScore.

Issue type

UX/Interaction bug (incorrect behaviour)

Bug description

When on my iMac I have several musical scores open with MuseScore and I send a midi command (defined via Settings/MIDI mapping) the command thus sent is executed in all open MuseScore sessions. I have noticed this, for example, with the PLAY, REWIND or LOOP PLAYBACK functions.

It seems normal to me that only the active session (active window score) should start playing.

Steps to reproduce

Prepare/Control some MIDI mapping for player functions in MuseScore / Preferences. (see screeshot as exemple)
Open several SCORES/ MuseScore sessions
Send "PLAY" MIDI Command to MuseScore (with keyboard or Elgato StreeamDeck i.e.)
Error : MuseScore starts playing all open music pieces at the same time

Screenshots/Screen recordings

MuseScore Version

MuseScore Studio version (64-bit): 4.3.1-241490902, revision: github-musescore-musescore-026c26b.

Regression

No.

Operating system

OS: macOS 12.7, Arch: x86_64

Additional context

Already Not OK in MS 4.2.0 with same iMac environment.
At the moment I don't have a Windows PC to do the same test on a PC.

Start by reproducing the issue with several scores open and a MIDI mapping for Play, Rewind, or Loop Playback. Trace how MIDI-mapped player commands are dispatched across open MuseScore windows, and consider the issue done when the command affects only the active score; the payload names no files or tests.