MuseScore 3: part playback plays full score
Example: created a full band score, but also created parts for each instrument. When I go to the flute part and press play, instead of just playing the flute part, it plays all the instrument's parts. (I hope this makes sense)
Comments
Know issue, see #109941: Regression—playback in single part instead plays full score
As mentioned in that issue, it's intended as a feature, so you have the choice of hearing the full score to play along with, or soloing via the Mixer.