I have installed both the Facebook app and the Facebook Messenger app. When I am connected to the internet (either through wifi or data), I receive one notification per message.
When I am not connected to the wifi (or connected to spotty wifi), receive multiple messages from a single person, and then reconnect to wifi, I only see the last message in my notifications.
How can I get a notification for all messages, once I reconnect to the internet?
Connected to wifi Receive Facebook message 1 Get Facebook notification for message 1 Receive Facebook message 2 Get Facebook notification for message 2
Spotty wifi/No wifi when receiving messages
Receive Facebook message 1 Receive Facebook message 2 Connected to wifi Get Facebook notification for message 2
(no notification for message 1)
Other apps, like the built-in iMessages app receive both notifications once wifi is reconnected.