I've had this problem before, probably since i've logged on Spotify via another browser. I've just found a solution, or at least it worked for me. I went to Spotify's website and turned on the processing of personal data in the privacy section (because i had it off). Then i went to Facebook's settings, in the app and websites section, and removed Spotify's access. Then i logged out from Spotify (probably it would have been better if i logged out before) and re-logged in with Facebook and now i have my name and profile pic back, along with all my playlists. Hope it can work for others too.