It now goes back to account page every time you leave and reopen.
If it stays like this I will uninstall it and use website instead.
I have never really used the giffgaff app, although I did give it a trial once, (downloaded it a couple of times and then uninstalled it straight away).
I personally think it's pointless, Is it really needed? when you have the mobile/desktop site! .... It's much quicker just to use your browser on mobile/desktop site!
.... hopefully @sloz resolved your issue anyway!