On the Matrice 30, they are able to switch between cameras while recording video, without going through the 2x-4x digital zoom, to jump to an optical telephoto, of any portion of the 1x screen, that can then be digitally zoomed in for further detail, but I believe both their cameras are also recording simultaneously. For us, we now have to continue to use Explore mode to be able to go from 3x to 7x and above. The 7x camera setting alone, without simultaneous access to the 1x for aiming the 7x during recording, is pretty useless. I wanted to be able to switch from optical 1x to optical 7x for best image quality in video recording.
The latency was up to 15-20 seconds on zoom and gimbal control (both scroll wheels), with normal stick control, but I was also experiencing significant RC Controller Interference in a new flight area, so that may have contributed. Back home, completely normal yesterday and today, and no crashes.
The app crash only happened once but it did immediately reload and resume, like yours. Seems like some buffer overrun or memory leak that needed flushing? Some goofy code in this latest update that will need another update to fix.
The big, black, obstructive, non-responsive dialog box at 15% has also thankfully not reappeared in two subsequent flights.