I'm not sure if these two are related, but I'm experiencing two problems:

When a friend sends a song to my Inbox, it doesn't show up in my inbox at all on my iPhone. It does, however, show up when I'm logged into Spotify on my Mac. I can send things to his inbox and he gets them fine, but my Inbox isn't showing any updates since 2012 and he's sent me a few songs this past week.

Also, I'm having problems sharing certain songs. This is an intermittent problem, but I'd say 50% of the time I share a song, it doesn't come up in my Activity feed. I've tried it on my iPhone and on my Mac, and the problem happens on both.