playback doesn't pan up or down to show the notes being played for an instrument part off the page that isn't not shown on the screen for a score with many parts

I recently did samples to play a measure of notes for all the musescore instruments in a category with the instruments listed on a score. so basically I have maybe 30 or even 70 different instrument parts in a score, so you can't see all the instruments on the screen (unless you have the view at 25 or 30% of the actualy size which is too small anyway to see or read the parts that well) since the list is too long to fit onto the screen, so one has to scroll down to see the rest of the instruments listed...
And basically, only one instrument is playing at a time with the rest of the parts having a measure of rest. When I try to play the file back for an instrument part that's lower on the page that isn't shown on the screen, the playback won't pan down to that instrument part so I only see the instruments with rests for that part being played rather than panning down to the instrument part with notes lower on the page to show that on the screen instead.
I tried making the above measures with rests invisible hoping that would make the playback pan to the instrument part with notes, and it does pan down to a degree but as it continues to go across the page with each instrument part going down the page and off of it, once again you can't see the instrument part with notes being played on the screen for the parts that are too low to see.... so I'm not sure how to get it to continue panning down when there aren't any parts shown on the screen during playback with panning on...you'll see what I mean with the file I attached...