STEPS TO REPRODUCE
- Login as Admin
- Go to Administer Wiki > Editing > Edit Mode
- On Versioning Section, set 'Enable Version Summaries' to Yes
- Set the 'Make Version Summaries Mandatory' to Yes
- Click 'Save'
- Edit a wiki page; it doesn't matter if you're using the Wiki Editor, Inline Form, Standalone WYSIWYG or In-place. Type some characters
- Click 'Save & View'
When saving the page, the user is prompted with a message box to enter a brief description of the changes made.
The prompt box is not displayed unless you do a hard refresh of the page (or clear the browser cache).