I have the problem of Android Apps (in my case "Conversations" on an Aquafish) losing the data connection. As mentioned in this thread by groxxorg (https://together.jolla.com/question/122636/bug-android-messaging-whatsapp-messages-arrive-late) I have deleted and then reinstalled Android support. For now my problem seems fixed but for how long?
Is there something in the Android support that gets broken after a time of usage and can only be fixed by a reinstall. If that's the case it seems to be a bug and Anroid Support needs some kind of cleanup function.
I hope this helps finding the problem because there seem to be more people having this problem.
Thanx for your work and your help and for SFOS to be an alternative.
PS.: I will write again in this thread if this problem is starting to occur again.