Has something changed with Dropbox sync or with iphone sync?

Operating system

iOS

Joplin version

13.0.7

Desktop version info

Joplin 2.13.6 (prod, win32)

Sync target

Dropbox

What issue do you have?

Dropbox sync has worked fine for a long time. But trying to sync iphone today for first time in a few days and it shows "syncing" for a long time, but never completes. When I try to cancel sync, it shows "cancelling" for a long time, but never cancels. Tried restarting Joplin on iphone, and tried restarting the iPhone. Windows desktop syncs fine.

Or are iOS version 13.0.7 and desktop version 2.13.6 not compatible?

Edit: updated to latest desktop version and mobile is now syncing.