GarageBand sound preferences need to be reset every few actions

Still new to Midi Guitar 2, and I have been able to play around just a bit. I definitely like what I have done so far, but I have one issue:
Often after clicking on “enable recording”, or muting/unmuting a track, the tracks become silent and I need to go back to my preferences to set the Audio output (it is sometimes the right one, but I just need to click on the dropdown menu and basically reselect what was selected. Is there any possible reason for that? Any fix?