We can provide a bit more insight into this. First of all, there are caps on the number of notifications a user gets. If you’re following a large amount of artists it’s possible you could hit this limit some days.
Second, very occasionally we have server issues. You may have seen a tweet from@SpotifyStatus letting users know "We are aware of some service issues and are working on a fix". This can sometimes interfere with notifications going out on that day.
However, these should not be affecting the majority of users when it comes to notifications. If you’re receiving only a handful of notifications per day, and continue to miss notifications on a frequent basis please let us know the following:
1. The artist/ album/ song just released.
2. Where you expected the notification (in the app, via email).
3. Did the notification arriving late or simply never arrive?
4. How many people/ artists are you following?
5. How many notifications do you get per day on average?
Thanks for your feedback everyone!
I got this when contacting @spotifycares
"Hi there! We're no longer sending notifications for every new release. If you're opted into New Music email notifications, you should receive one email a week that highlights new releases from the artists you follow alongside a link to your Release Radar playlist. This is the best place to see all new releases from the artists you follow /SC"
So I guess they no longer send out push notifications and you have to "opt in" for email ones 😕