It's not been working in the Beta Version (5.2.1.2) for some time either. I've filed two bug reports so far (one for the Manual Notifications error and one for the Toast updates which were also not working) and I was actually curious if the problem had been fixed in the general release version. Guess I have my answer now
My suggestion would be to open the app, got to settings, tap Terms and Policies, and at the very bottom you will see "report a problem" (no, they don't make it easy to find). and if you can fill out a problem report.
You can also go to wpfacebook.uservoice.com and describe your issue. The Notifications issue for instance is already being discussed here:
Beta and Store versions both not notifying properly and when they do I don't get the alert tone, Really is about time they fixed it, Roll on 8.1 and deeper integration.