[firebase_analytics] message_id is not contained in notification_open event

[canisterism]

Hi.

The firebase analytics document says notification_open has message_id as its parameter when a user opens notifications but data in my google analytics doesn't contain it.
I think it might not be a flutterfire problem, however, does anyone knows about this?
https://support.google.com/firebase/answer/7061705?hl=ja