Copy/pasting from mediawiki.org:
A change to an existing reference is not shown on the sidebar or the main window.
Go to an article with an reference, e.g.Extension:Scribunto (1) and enter edit mode
Click on a reference, e.g. reference 1 ("i.e. proc_open is not within the array of disable_functions in your server's "php.ini" file.")
Change the reference text to "test1"
Click apply changes
Click publish changes
Click review changes
A change to an existing reference is shown .
No change is visible, and there is no sidebar description.