did the old Calendar version add the start and the end time in the event title by itself ?
As we can see in this page : https://www.daypilot.org/daypilot-pro-4-2/
I test the new version and the time disappear in the title.
As we can see in this page : https://doc.daypilot.org/calendar/
I loot at in the application code I work on but I didn't find the place where the time was added...