guest account

So I was playing online (competitive) and for some reason when finishing the fight in the place of showing the name of my enemy as usual the name "Guest" was shown instead Probably because of the lag, although in the course of the battle there was no lag

Hi. I have a question. After today's update the game crashes during the intro movie causing the phone to reboot several times. But most unpleasant thing is that it logged out from my account (yes, unfortunately it was a guest account, i think) and ask me to start everything from begining. Is it...