I don’t know if this has been noticed, but I upgraded to Pro 2 to try the video facilities. Only used it very briefly but I muted an instrument (voice) which I have notated as a ‘narrator’ all on one note. I saved the file but on reopening, although the F mixer has the track ‘muted’ (yellow tab lit), the track still plays back until I deselect mute and then reselect it.
Thanks for reporting this. We will try to fix it as soon as possible.