Calendar: How to make travel time compute from previous event

I am trying to have calendar compute the travel time to my next event. The previous event is recorded with a location, which is not my home, and the event view shows a mini-map for that location.

For some reason Calendar insists on calculating travel time from home. I want it to compute travel time from the location of the previous event. What am I doing wrong?

M1 MacBook Pro, Ventura 13.3.1 (a).