Very recently the chief editors of the journal 'EMS SURVEYS IN MATHEMATICAL SCIENCES' resigned because they published a paper (whose "methodology does not contradict Cantor’s and non-standard analysis views and is based on the Euclid’s Common Notion no. 5 “The whole is greater than the part” " - from the abstract) which turned out to be of questionable quality.
Apparently the editors were "unaware of what was happening" (statement of the editorial board). This seems very peculiar to me; of course it happens here and there that an accepted article contains a minor error, sometimes even a major error. But usually the editors do not resign simply because they accepted a paper with flaws. Does anyone know of similar cases? In this particular case the paper will apparently not be retracted, even though apparently none of the editors was aware that this will be published. Why would editors choose to publish it nevertheless?
Officially (according to the publisher, as quoted here) "it seems that there is not enough grounds for a formal retraction." And yet the statement suggests that the editorial board is thoroughly unhappy.
Remark: I am particularly interested in mathematics journals (hence the tag). However, I am also interested in other fields.