I've had this happen 6+ times. Some one a 2015 MBP and some on a brand new MBP. All the sudden Mainstage stops playing the playback files and then all the buttons on mainstage become unresponsive. I CAN click them by MIDI or by the track pad, but they do nothing. On a few occasions even after shutting down the app and opening back up, it still was unrespnosive.

Usually a computer restart will fix it.

I have NO idea how to even troubleshoot this. It's so random and it just seems like something internal to Mainstage is broken.

Anyone?