The Schedule Assistant is on, if your plan includes it
When a listing agent declines or proposes a different time, the assistant suggests how to rebuild the rest of your day around the stops already confirmed. It used to be a BETA switch in Settings that every agent had to find and turn on for themselves. It is now on by default for agents whose plan includes the Schedule Assistant and for every agent an organization covers, and hidden from everyone else. If you turned it off before, it stays off, and the switch is still there. Everyone gets the ordinary route ordering either way: real driving times, no assistant involved.