Actually it's exactly the same whether you use DJI Go or DJI Fly
Just the interface looks a little different.
In each you set the exposure method you choose and tap the AEB icon and decide how many shots.
You can make the dumb choice and leave...
The data shows your problems beginning when the drone reached a height of approx 6 ft.
Then the compass data rapidly changes without any corresponding joystick input.
The pitch and roll data suddenly changes to extreme values, much higher than...
No
No and your equipment doesn't share your location except that the drone shares it's location with the controller and vice versa.
You worry unnecessarily about something that doesn't happen.
It makes perfect sense, if you want the aperture to stay constant, you need to lock down the aperture setting and allow the shutter speed to change.
Did your other drones have a controllable aperture?
If they did, they didn't work any differently.
Since they share the same camera, the quality should be the same.
The most likely cause is the different settings used.
If you can upload examples from each model to Google Drive or similar and post a link here, the metadata might have some clues...