This is a followup to Bug 42715 which had been marked fixed in December 2012, and was reopened and fixed again in February 2013. As suggested by Andre there, I'm opening a new bug now.
The log at https://meta.wikimedia.org/w/index.php?title=Special%3ALog&type=notifytranslators shows two recent cases where several identical notifications were sent out:
21:58, 2 December 2013 Ijon (talk | contribs) sent a notification about translating page Grants:Index/Eligibility requirements; languages: all languages; deadline: none; priority: (unset); sent to 1448 recipients, failed for 0 recipients, skipped for 218 recipients
21:57, 2 December 2013 Ijon (talk | contribs) sent a notification about translating page Grants:Index/Eligibility requirements; languages: all languages; deadline: none; priority: (unset); sent to 1451 recipients, failed for 0 recipients, skipped for 215 recipients
Example notification: https://meta.wikimedia.org/w/index.php?curid=131833&diff=6586342&oldid=6585821
(Asaf/Ijon says that while he clicked the browser's back button to return to the "preview notification" screen, he is certain that he did not go forward again to the send button, or reload it.)
This looks unintentional too:
09:06, 24 November 2013 Nemo bis (talk | contribs) sent a notification about translating page User:MediaWiki message delivery; languages: all languages; deadline: 2013-12-31; priority: medium; sent to 1099 recipients, failed for 0 recipients, skipped for 563 recipients
09:05, 24 November 2013 Nemo bis (talk | contribs) sent a notification about translating page User:MediaWiki message delivery; languages: all languages; deadline: 2013-12-31; priority: medium; sent to 1442 recipients, failed for 0 recipients, skipped for 220 recipients
09:05, 24 November 2013 Nemo bis (talk | contribs) sent a notification about translating page User:MediaWiki message delivery; languages: all languages; deadline: 2013-12-31; priority: medium; sent to 1446 recipients, failed for 0 recipients, skipped for 216 recipients
Probably also this earlier case (see https://meta.wikimedia.org/w/index.php?diff=5654816&oldid=5654815 ):
01:53, 16 July 2013 MF-Warburg (talk | contribs) sent a notification about translating page Admin activity review/2013/Notice to communities; languages: all languages; deadline: 2013-07-20; priority: (unset); sent to 1589 recipients, failed for 0 recipients, skipped for 5 recipients
01:53, 16 July 2013 MF-Warburg (talk | contribs) sent a notification about translating page Admin activity review/2013/Notice to communities; languages: all languages; deadline: 2013-07-20; priority: (unset); sent to 1590 recipients, failed for 0 recipients, skipped for 4 recipients
Version: unspecified
Severity: normal
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=42715