Like out of a wifi range? Yeah that happens all the time.
Ha, .. this is funny that I am trying to help you Catch. I had an old flip phone until about 3 weeks ago. But I love my new phone, .. and I have worked in 'IT' forever.
It is a Samsung Galaxy S4. I play with it all of the time, figuring out all of the settings and what they all do. I want to know everything about it.
You would stay logged in to an app or account all day as long as you are connected to the network. If you lose your wifi signal though, .. you would not be logged in when you get your signal back.
That may be causing your issue.