When going to a link to a specific oldid, the {{int:missing-revision}} is displayed if the page was deleted, and the software falls back to the wiki's main page, just displaying the message rather than the page content. Therefore, {{PAGENAME}} and {{FULLPAGENAMEE}} are incorrect in such cases, unless the main page was indeed the target.
Version: unspecified
Severity: minor
URL: https://translatewiki.net/w/i.php?oldid=4020383
Clarifying summary: this happens because you have no title= , you know don't you?
https://translatewiki.net/w/i.php?title=Portal:Pjt&oldid=4020383 works.
Is there any such link from the interface itself? Hand-made links can't be expected to work, and even the correct one is rather hidden in this case.
Yes, it works if the title parameter is set. As someone who uses the CVN IRC channels, I often come across such instances, but then, it usually supplies the dif and oldid, and sometimes the rcid.