Using an iPhone 5s on iOS 10.3 (14E5230e) beta.
I recently tried to re-download Spotify after having some issues with low memory. Unfortunately Spotify didn't complete install, so there was only the grey app tile and after trying to delete it it remained as an uncompleted grey tile with just a number as name:
So I tried to delete it, but after confirming that all other data of that app will be deleted the app is still there. Pressing on the app has no effect. Reinstalling Spotify leads to having Spotify as a additional app - full functional.
I already made a soft reset (several times) also tried to delete it via iTunes (there it doesn't show up), via memory management (doesn't show up there neither). Finally I did exclude it from iCloud backup (shows up there - I know, it's funny).
Before I take the step to do a factory reset and recover the phone via backup - does anybody know what I can do else?