Push notifications not working on android 8.0 real device.. Has anyone experienced anything similar? They work in the android emulator..

android {
    compileSdkVersion 28
    buildToolsVersion "28.0.3"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 28
...
}    
dependencies {
compile "com.android.support:appcompat-v7:27.+"
...
}

what API level is your emulator?