In T353115#9395363, @Frostly wrote:

Your talk page was created by a user who sent a welcome message. Best practices for welcome messages differ from wiki to wiki; on the English Wikipedia, messages are usually not sent for accounts without edits, but I’m not sure of the policy that arzwiki has. In general, though, I think that blocking creation of talk pages is not worthwhile; communication is often necessary. In terms of redirecting talk pages, this can be partially achieved through creating a global user page https://meta.m.wikimedia.org/wiki/Global_user_pages and indicating your home wiki.

Yes, page importing vs visitation sounds like a logical explanation for the contradiction. Thank you for linking these bug reports together, @Pppery; very much appreciated. :)

In T290534#7774122, @Dylsss wrote:

Special:ListFiles is blank because the old versions are deleted (as non-free files).