Last modified: 2014-05-07 17:18:15 UTC
Go to a page that is protected. Click edit. You'll be prompted to login/signup. When dumped back on the page the edit button has a lock on it and the message: "This page is protected to prevent vandalism." It should appear locked and not prompt the user to login.
Prioritization and scheduling of this bug is tracked on Trello card https://trello.com/c/PFGdLlSo
Change 131235 had a related patch set uploaded by Jdlrobson: Show toast when a page is protected https://gerrit.wikimedia.org/r/131235
Change 131235 merged by jenkins-bot: Show toast when a page is protected https://gerrit.wikimedia.org/r/131235