Editing the documentation at https://www.mediawiki.org/w/index.php?title=Template:Unsigned/doc&action=edit results in the Type field for User being empty (none of the valid types is preselected. I would expect "User" or "Unknown" to be selected).
The editor's code still contains logic for the alias map, and it doesn't dirty it on save. But the interface doesn't use it. Seems like something goes wrong.