I noticed a few issues on my last flight that might be of interest.
Mapping a large area, when you hit the RTH button to change batteries the drone continues taking pictures on the way back and landing until you shut it off.
When resuming the flight the photo count on the mission resets to zero.
When resuming the drone goes back to where it left off and flies it’s mission but fails to take photos, you need to bring the drone back, close the DD app, re-open, reconnect drone then resume the mission. You need to do this after every battery swap or you could fly a large mission and take no photos.