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.

Here in my office, on Wifi, it works as advertised. At the airport Sunday, I was on mobile data and was unable to change POB or other information. I can only think this was the cause, a bad mobile connection maybe?
I still think it would be good to have an 'enter' or 'confirm' button on the sub-forms popping up when working on the flight plan.