So for the longest time, I could see a song I liked, choose share, then type the name of my friend in to send them the song through the Spotify messaging system.

I can't do that anymore. 

When I find a song I like and hit share, my Samsung Galaxy S5 pops up with a screen asking "Share Using..." This has a bunch of my apps listed like twitter, facebook, fb messenger, messages, email but it doesn't have Spotify on there. I can't find a way to send a song viz Spotify to anyone from mobile.

To clarify: the internal Spotify "Post to Followers" and "Send To..." pop-up never appears.

This has never been a problem before so I don't know what caused it but any help would be appreciated.