I don't know how I did it, but my Ubiquity Container is no longer syncing and I can't delete the contents by using the Manage Storage section in iCloud contents (Mac says try again, iOS doesn't do anything).
I build an option into my app to try and delete everything from the container and have done it on every device that's connected, restarting, reinstalling applications — the works, nothing will sync across my iOS devices.
At this point, I am getting pretty frusterated. I can no longer use my app on my account with iCloud. It's working fine for other testers, sandbox users, etc. But my own Ubiquity Container won't sync.
Please anything out there, this is impacting my development pretty dramatically (I've thrown at least 5 hours into this today!).
After removing everything from my container from every single device again, taking a break and stepping away from it, then coming back 2 days later, everything seems to be working as expected.