Mobile Sync

Greetings!

After the upgrade to rekordbox 7 and rekordbox 4 on ios, i'm unable to sync my songs or playlists. The connection between rekordbox apps is successful.

When selecting songs or playlist to transfer; the status bar shows percentage until complete. once done the indication to show the song is located on the device is still grey.  

I've checked the basics; internet, storage, reinstalled the app on both windows and iphone, both are signed in to the same account. 

Any assistance would be great!