Having this same problem as well "On my iPad. Click save to on an article you want took save, click the Evernote icon from the range of resulting options, the little compass comes up, saving circle completes, the just stays in never ending saving. Nothing gets posted to Evernote.
I am on ipad 10.5 iOS 11 Dev. beta 9, but the issue was happening in iOS 10.
Earlier user DTLow stated "I have an open ticket on this #2195855"
Does this mean that is a known issue and you are able to reproduce? any update on the ticket you can provide..tx!