Event repeats miss one out incorrectly

User created an event (a nightshelter) spanning 2 days - started 9:30pm ends 7:30am next day. Then they repeated the event for 2 months, correctly stating they wanted the first repeated event to start on the day the first event finished. e.g first event started Oct 10 and ended Oct 11 so first repeated event was to start Oct 11. However the repeated events missed one event - the one on the day the first event finished. The rest were repeated correctly. This is reproducible on the demo systems - screenshot shows that the event for Oct 11 to 12 is missing.