I have a Galaxy S2 that is rooted and I recently upgraded to Kitkat 4.4.
After doing so, I've noticed that Facebook Messenger does not alert me when a new message comes in. It would before the upgrade, and I restored it from backup, so I assume it's the same program.
I have gone through the interface to ensure that notifications are set to be on. I have also looked in the app manager and made sure that notifications are enabled for this app.
I do seem to be getting notifications with Gmail when I get a new mail, but I'm not sure of other programs are affected.
How do I ensure that Facebook Messenger notifications are operating as they should?