As the cellos play the first measure (185 of the entire work) in the screenshot, the playback suddenly decides it wishes to change to the double basses as it begins to play the F. Everything s afterwards also has bass playback. It is as if the score has randomly decided to change instrument mid-measure without me commanding it to.
I've tried changing the instrument to see if that resets the playback (to no avail). I've reinstalled Noteperformer, checked the mixer settings (which all seem to be in order). The only solution as of yet is to add another cello part and transition the music from this point on, however, I want to know if there are any other remedies.
Just to be clear, the cello playback when I place the note is perfectly functional. It only changes when I initiate playback. This problem has not effected any other parts either.