When updating the flightplan form, for example Emergency Radio, after entering ELT, I pressed the arrow left on Android and was thrown out of the flightplan form. When I do it at my desk, it seems to work better, at the airport, with mobile data, it was impossible to enter data.
I would prefer the sub-forms of the flightplan form to have their own 'back' button instead of relying on the left arrow of Android. If you press the left arrow too long you loose the information you just entered.

I'm sorry, I still have no idea what you are talking about. On Android if you go into the Emergency Radio screen and change any of the options, a simple press of Android's back button is all that's required to get you back to the flightplan form so you can change other options.

There's no such thing as a long press on the Android back button, unless your device has some sort of bespoke "feature" which closes all windows when you do it. That wouldn't be SkyDemon's fault though.

What am I missing?