I attempted to clarify that this is an issue when performing a move operation on a subject page that, given the option to move-subpages, talk subpages are not visible to the end user. This is critical for editors handling page moves, especially if the subject namespace does not support subpages, and the talk namespace does, and the editor cannot see the pages meant to be the talk pages of other distinct legitimate articles (i.e. MediaWiki thinks they are talk "subpages" when they are actually standalone).

Consider this scenario: we have these pages:

• Foo
  • Talk:Foo
  • Talk:Foo/Archive 1
• Foo/bar (this is not a subpage of "Foo" per current config)
  • Talk:Foo/bar

Suppose an editor wants to move "Foo" (Special:MovePage/Foo) and its legitimate subpages to "Foonew". Checking move subpages will incorrectly move the unrelated talk page "Talk:Foo/bar" to "Talk:Foonew/bar". And there is currently no way to see what the name of this talk page is.

Removing Wikimedia-Site-requests as this is not a request to change some existing configuration option on some site.

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Change 314848 had a related patch set uploaded (by Andy M. Wang):
Display both subject and talk subpages for Special:MovePage

https://gerrit.wikimedia.org/r/314848

Yay, thanks for submitting a patch :) I'll try and look at it in the next few days.

Any updates or suggestions by any chance? Interested if this may be merged soon @Legoktm

Change 314848 merged by jenkins-bot:
Display both subject and talk subpages for Special:MovePage

https://gerrit.wikimedia.org/r/314848

Great to hear!