I have read about this problem a lot. I was getting notifications, but they were extremely delayed. For instance I read your 500th article post, I didn’t get notified of the tag until after I had read it. A lot of stuff like that was happening, but I would get the notification just super delayed. A lot of people are seeing their stats drop recently as well, and I am wondering if Medium is having more problems behind the scenes. 🤷‍♀️