iTunes not manually syncing music
I am encountering a recurring issue with the September 2017 update to iTunes 12.7.0.66.
When trying to manually sync music from my computer to iPhone 7 Plus, the sync fails when only partially completed.
For example, if I select an album worth of songs from my Library and drag them over to my connected iPhone, only some of the songs will upload, and then the status bar at the top will display the message "Canceling cync"will be displayed and the sync will quit only partially resolved.
When I then attempt to re-sync, the same thing will occur. However some songs synced previously will inexplicably sync again sometimes failing.
I've restarted iTunes, restarted the computer, restarted my iPhone - doesn't help.
Are others encountering this problem?
Hopefully, fixed quickly with an update - but if anyone has any suggestions, barring re-initialize my iPhone or buying an iPhone X will solve the problem, I'm all ears.
Thanks!
Mac Pro, Mac OS X (10.7.2)