When I uncheck my name under Show Calendars, the calendar entries are hidden. However, if I close the calendar and re-open it, my name is still unchecked but my calendar entries are visible. Unchecking my name only hides calendar entries temporarily. The symptoms are the same only up to a point.
Andres, is the issue also seen on the director's PC running the client in Basic mode? If so, then try renaming the director's \data\workspace folder, and restart the client in Standard mode.