I'm attempting to get notifications in the system tray with AdvancedPlatformDelivery without luck.
I have them working if I use Package object, but I want to be able to use the collapse_key feature as well.
I've read the following and setup my json object passed in the AdvancedPlatformDelivery.Json field. It send / received the message, but doesn't come up in the system tray on android if the app is closed, or in the background. It will deliver the message as soon as I open/bring to foreground the app manually.
https://firebase.google.com/docs/reference/fcm/rest/v1/projects.messages#AndroidConfig
I specifically need help implementing the collapse_key feature on android. I'm using the Firebase system upgrade. What am I missing? Thank you.