I am attempting to restore a previous version of a draft. Clicking the revisions link in the editor sidebar opens the revisions panel, but it looks like nothing that I can find in the documentation or anywhere else online. Instead of a slider at the top and a “Restore this revision” button, there is a vertical list of previous saves, and “Cancel” and “Load” buttons. Clicking “Cancel” clears the page, of course. Clicking “Load” does nothing as far as I can tell. It clears the page but the draft does not change, nothing is restored.

Mystified here. Any hints would be appreciated.