Someone reported that they got an email from English Wikipedia with a link to an empty diff. After some investigation it turned out that the email was triggered by a change on Wikidata. We should investigate why that email was sent and if we can suppress it or make it show a meaningful diff.
The diff link from the email: https://en.wikipedia.org/w/index.php?title=Pseudomonas&diff=next&oldid=792131833
The edit summary given in the email: /* wbsetaliases-set:2|cs */ pseudomonáda, pseudomonády This is a minor edit