Mixer panel (not) showing
Playbacked a score a number of times, partially, with the mixer panel open. Switched to another score, noticed the mixed panel gone. Going back to the first score, still gone.
Pressing F10 a number of times, no effect. Same with View/Mixer menu.
Closed down MuseScore, restarted and loaded a score. Now the mixer panel appeared without me activating it. The View menu has Mixer unchecked:
OS: macOS 10.14, Arch.: x86_64, MuseScore version (64-bit): 18.104.22.16866, revision: 8ca4d2c