Steps to Reproduce:
Recently on Portuguese Wikipedia, I made minor edits in the articles //Timerosal//, section //Autismo//, and //Dialeto recifense//. In the former, I replaced the phrase "incidências de autismo" (autism occurrences) by "diagnósticos de autismo" (autism diagnoses), and in the latter, I only added a "carece de fontes" (sources needed) predefinition.
I used the default Wikipedia article editor, and could not reproduce the problem on test2.wikpedia.org, since I did not find any test article with references there.
Actual Results:
Those minor edits actually resulted in erasure of all references of the //Timerosal#Autismo// section and of the article //Dialeto Recifense//, and I received two "last warnings" of a Wikipédia moderator attributing vandalism to me.
Links to problematic differences:
https://pt.wikipedia.org/w/index.php?title=Dialeto_recifense&diff=56265310&oldid=56264919
https://pt.wikipedia.org/w/index.php?title=Timerosal&diff=56273214&oldid=56272155
Expected Results:
Simply the minor edits, without any damage to references of those articles.