Event source.title and source.url in the new calendar interface shows "This event was automatically created from an email. [View confirmation]"

[tde...@gmail.com]



When creating an event with the API:
https://developers.google.com/google-apps/calendar/v3/reference/events/insert

If I fill the fields source.title and source.url:
> source.title     string     Title of the source; for example a title of a web page or an email subject.
> source.url     string     URL of the source pointing to a resource. The URL scheme must be HTTP or HTTPS.

With the old interface, on the event I could see a read-only field, between "Calendar" and "Description":

> Source   [Link icon] The title of my link, from [source.title]

And "The title of my link, from [source.title]" was a link to [source.url]




With the new calendar interface, the same event instead shows:

> [Email icon] This event was automatically created from an email. [View confirmation]

And [View confirmation] is a link to [source.url]



Is that a bug on the new interface or is the API documentation deprecated for these fields?