Moving notes between shared notebooks is inconsistent

[RevDevPaulReynolds 4]

My wife and I each have at least one notebook that we have shared with each other. On the old Android client and on the new Windows and Web clients, I'm able to move any note I want into the notebooks she owns, but the new Android client displays a lock icon next to her notebook in the move dialog and I can't move the note in there. Curiously, I can move notes from that notebook which she owns over into mine, which she is unable to do on her (new) iPhone client.