Page title clears when editing page in 16.6

Hello XWiki world!

We’ve run into a weird issue with our freshly upgraded (to 16.6.0) site. When I go to edit a page, the page title box gets cleared and I need to re-enter it in order to save edits on the page - see image below. I am wondering if others have experienced this issue - whether it’s a bug or it’s a page loading issue on our end? :melting_face:

Thanks!