Although it can't be used in articles, it is widely used elsewhere, including userpages.
If you try and VEdit https://en.wikipedia.org/w/index.php?title=User:Elitre_(WMF)/Sandbox&oldid=573626556 you'll notice that this reflects in reference numbering being incorrect, since the ones in the divbox will be ignored.
Thanks.
Version: unspecified
Severity: enhancement
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=54803