Selection and playback with multiple instruments
When playing a part with at least two instruments, if a specific bar in a specific instrument is selected, only this instrument will play. Musescore 3 used to play all instruments in that case, and it allowed for an easy navigation and jumping during playback. Now you have to select one specific note to have that behaviour.
I think this should be an option of some kind, because if I really want to play only one instrument, i'll just go into its individual part.