Certain things have never given notifications properly. If it worked before, it'll probably be fixed eventually.
Bugs are a way of life on GD. They aren't adept at web administration. They can't sort things or other simple tasks that require the most basic of computer programming literacy. I think it was fixed recently, but for years we were never notified of messages in the user's profile comment section. Keep the expecations low, Bwahah.
If it's not isolated and is more a matter of a multitude of issues, it could be a matter of an upcoming update and them working behind-the-scenes.