So, having fully watched the video, this is what I learned from it.
1. If you only use the onscreen shutter button, everything works as expected when choosing any of the shooting modes with any number of selected shots. No surprises.
2. To use the transmitter shutter button reliably, you
first have to
pre-
program it by taking
one set of images with the
onscreen shutter button in your chosen shooting mode,
specifying the number of images a single shutter press with the transmitter shutter button should take.
As long as you do 1. or 2.
each time you make
any change to your shooting mode, including the number of frames to be taken, everything is Golden!
Since we now have all these new fancy flying modes that fly the aircraft for us, during previously complex manual moves, that leaves your right or left hand temporarily free to use the onscreen shutter button, at least the
first time you need to use a new shooting mode or change the number of frames selection.
I imagine DJI will tell you this isn't a bug, but an undocumented feature. Maybe they will fix it anyway, in the next release, so it works as people expect it to...rather than needing to come here to learn how to use it the way
they intended it!
Happy shooting!