On https://en.wikipedia.org/w/index.php?title=Alan_Pardew&oldid=1051346054&veaction=edit the first paragraph which only contains {{use dmy dates}} gets put in a <p> with the mw-empty-elt class which sets display: none.
In the editor this causes two problems: the template is not editable or removable (unlike {{Use British English}}), and the cursor is placed in that paragraph, so no cursor is visible when the page loads.
Another simple use case:
wikitext:
* Foo * * Bar
In VE, the middle hidden list item is hidden
Testing
- Create a page with the sparse wikitext list above (* Foo ...)
- Open the page in VE
Observed
- The middle empty list item is not visible or editable
Expected
- The middle empty list item is visible and editable
