This issue is back with a twist. This had happened similarly earlier in the year and you had identified a server side issue that fixed the issue.
When I make a clipping document in the desktop app, it will not show in the iOS app on iPad, but does in iOS app on iPhone.
It used to be with the earlier issue that if I made a new clippings document on the iPad that the one that was not showing woudl suddenly appear. That is no longer the case.
If I make a clippings document on the iOS app, it does show up on the desktop app.
iOS ver. 10.3.2
iOS app ver. 5.15.2