FCM reports Received/impressions/open Counts are showing zero value

Question

On the FCM reports, Received/impressions/open Counts are showing zero value. Only "sends" is correct. I tried to open the app with a tap to Notification, But can't see the received and open count. How can I track the received and open count on here? What I have to do anything on the app?

Answer 1

I've faced the same problem. Solution was: add analytics label. See https://firebase.google.com/docs/cloud-messaging/understand-delivery?platform=android#adding-analytics-labels-to-messages for more details.