Jira Cloud regression: worklogDate JQL returns incorrect results

I can also reproduce the same issue on my dev Jira, so I assume the problem is quite widespread and they may be fixing it per instance/request. I suggest you or your affected customers open Jira Support tickets as well. The situation is really annoying - after the recent rollout, JQL search for worklogs (even within the latest 1K) simply doesn’t work correctly, more then a week passed and is no global fix.