OS Version: 11.6
OS Language Setting: English
Event C has start = start of event A and end = end of event B. A comes before B, so there is no logical problem with that, but C has the ! conflict notice at beginning and end.
How would I know?
I created events A and B before C.
A and B are the time Grey is elsewhere and Jane is in charge at the bar.
My timeline file is relevant.