Firebase first_open event has become slow since the last week. Firebase says that "conversion events are uploaded immediately by the SDK in order to make them actionable more quickly" So, I expect the data will be more or less immediately sent down from the app when the user triggers it or when the app is in background, but it becomes obviously slow these days.
- Viewed on Sep 07, there were 423 first_open on Sep 06.
- Viewed on Sep 08, there were 1306 first_open on Sep 06.
- Viewed on Sep 09, there were 0 first_open on Sep 08.
- Viewed on Sep 12, there were 1092 first_open on Sep 08.