An edit such as
https://en.wikipedia.org/wiki/User_talk:Jimbo_Wales?diff=468988397
whose timestamp is 2012-01-01T20:35:50 should be present in one of these two pages, but currently isn't:
https://en.wikipedia.org/wiki/Special:Contributions/Jimbo_Wales?limit=3&offset=20120101203550
https://en.wikipedia.org/wiki/Special:Contributions/Jimbo_Wales?limit=3&offset=20120101203550&dir=prev
Compare with the API, where setting the "ucend" parameter still returns the edit with that exact timestamp:
https://en.wikipedia.org/w/api.php?action=query&list=usercontribs&uclimit=3&ucstart=2012-01-01T20%3A35%3A50Z&ucuser=Jimbo%20Wales&ucprop=timestamp
The problem is not exclusive to [[Special:Contributions]] (I first noticed it at [[pt:Special:AbuseLog]])
Version: 1.22.0
Severity: normal