Hi, Im currently having  issues with my I phone that keeps de registering when the app is in the background.

I experienced this with my Android phone but  managed to sort it our as it was a battery setting, i am however unable to find the reason why this is happening on the I Phone.

The App works perfectly but just does not stay registered while in background.

Maybe your server doesn't have push notification support or the app built-in push support doesn't work for some reason. A log might help to find out.