Mine seems to be working correctly. But there may be some confusion regarding which lock is being searched.
When adding/editing an event for a person or family,two locks are shown. One lock is in the shared portion of the event reference editor. Red in attached screenshot. This is the lock when in events, the filter rule “Events marked Private” will find. In a person’s event list, this lock does not display in the list of events.
The second lock (green in screenshot) is the lock displayed in a person’s list of events. It is actually a part of the People database and not searchable through the event list.
I know, a little confusing. There was an earlier thread that discussed the two locks in displays.