In our app everything about push notifications works perfectly except one device -Asus zenfone 2, Android 5.0-.
Let suppose that our app is running on the foreground, all the devices can get the notifications without any problem (including asus phone)
Let suppose again that our app is killed by the user and removed from the tasks. In this particular case, all devices except asus zenfone 2 get notifications if server sends message.
We tried almost everything to understand the reason
like installing the device from fabric settings,
checking the whole process with another new created user
nothing has changed.
Do you have any idea why this is happening?