GIGAM25

I am here because of same issue as well 

further checking, it turned out to be a huawei phone. there's separate config you need to do. check onesignal documentation regarding push messaging in huawei

> Hi. I have the same issue on Huawei phone. It works in debug mode but not in release mode. huawei has a separate config. check the documentation https://documentation.onesignal.com/docs/authorize-onesignal-to-send-huawei-push