Calendar invitation acceptance status not synchronized

When person A creates a meeting in his personal Calendar, and invites person B, an invitation is sent to person B. Works.
In the database I can see that 2 calendarobjects are being created, one in A’s and B’s calendar.

Person B accepts this invitation by clicking on the link in the invitation mail. Also works.

But the attendance status is only updated in A’s calendar. Why is this?
B cannot see that he/she accepted the meeting.
Bug, misconfiguration or feature?

Kind regards, Marcus

  • Nextcloud 20.0.8
  • Calendar App 2.2.0