Section break pause is not respected in a file with parts after save/open cycle.
See subject. Evidence:
Notice at around 1:20 (https://youtu.be/cry0rDIWt5g?t=80), as the piece transitions from movement I to movement II, the audio is not sounding whereas the video is already showing the score being played. If you check out the score at bar 24 (1st movement), you'll notice the section break is set to 0:00 seconds pause .Apparently, the video export does not respect that.