Intention:
I used my userpage as a sandbox
https://da.wikipedia.org/w/index.php?title=Bruger:Elitre_(WMF)&action=history,
and the edits in which I tried to add references do not show up in the history,
although I did manage to save them and also got the message that confirms this.
(For the record, I was trying to reproduce
https://da.wikipedia.org/w/index.php?title=F-35_Lightning_II&diff=prev&oldid=7409486
and
https://da.wikipedia.org/w/index.php?title=Enhedslisten&diff=prev&oldid=7414100
, where there might be a connection between adding a reference and getting a
duplicated infobox).
Reproducible: Always
Version: unspecified
Severity: normal