Hi Gianluca,

Thank you for your detailed answer. When you talk about migration from GCM to Firebase, i am not sure that is case in our project. Because first project we created was through Firebase console, and then we switched to another, also created through Firebase. So i think there was no reason for migration at all. Also to note that this issue is not reproducible on all our test devices, just on some of them.

Best regards,
Lazar