Possible mistakes of MediaWiki message delivery

User talk pages on Commons edited by the MediaWiki message delivery in March 2015 with redirects pointing to them

SQL

USE commonswiki_p;
SELECT
  page2.page_title AS redir_from_usertalk,
  page.page_title AS redir_to_usertalk,
  rev_id,
  rev_timestamp
FROM revision
INNER JOIN page ON page_namespace = 3 AND page_id = rev_page
INNER JOIN redirect ON rd_interwiki = '' AND rd_fragment = '' AND rd_namespace = page_namespace AND rd_title = page_title
INNER JOIN page page2 ON page2.page_namespace = 3 AND page2.page_id = rd_from
WHERE rev_user_text = 'MediaWiki message delivery' AND SUBSTRING( rev_timestamp, 1, 6 ) = '201503'

SQL

Checking query status...