Adding songs to playlist

[tomasrex]

When I try to add songs to my playlist on both my iPad and iPhone, I have to wait for some time (30-60 seconds) before I get the message that it was successfully added... 

I open the menu to add the song, and I click on the playlist I want, then I need to wait with the menu open untill Spotify adds the song. If I click more than one time, it will duplicate the song. (tried re-installing)

Does anyone else experience this issue?