After upgrading to android sdk to v26 the notification icons became white boxes, we have solved this issue by using white/transparent icons.
However, on Samsung phones the small icons in push notifications are green android robots. In all other phones where push notifications are using large icons (white/transparent) it works perfectly.
How can we fix the Samsung issue?
I am using:
- React native: 0.56 (0.55.4 too)
 - React native firebase: 3.3.1
 - Android Target SDK: 26
 
I have:
- ic_launcher.png which is a multi-color logo for the app.
 - ic_notification.png which is white/transparent logo for the >Lolipop push notifications.
 
Corresponding lines in android.manifest:
    <application
      android:name=".MainApplication"
      android:allowBackup="true"
      android:label="@string/app_name"
      android:icon="@mipmap/ic_launcher"
      android:theme="@style/AppTheme">
        <meta-data
          android:name = 
          "com.google.firebase.messaging.default_notification_icon"
          android:resource="@mipmap/ic_notification"
        />
        <meta-data 
          android:name = 
          "com.google.firebase.messaging.default_notification_color"
          android:resource="@color/orange" 
        />