Receiving Invite to Meetings

I believe I have found a bug related to meeting invitations.

Environment

  • eM Client 10.4.5608
  • macOS Sequoia
  • Yahoo IMAP email account
  • iCloud calendar (CalDAV)
  • Microsoft Teams / Outlook meeting invitations

Problem

When I receive a Teams meeting invitation:

  • The invitation email is displayed correctly.

  • I can click Accept, and the RSVP is sent successfully.

  • However, the meeting is NOT added to my iCloud calendar.

  • No calendar item appears in eM Client or in Fantastical (which uses the same iCloud calendar).

  • What I verified

  • Creating a calendar event manually in eM Client works and syncs correctly with iCloud.

  • Dragging the same ICS file into eM Client imports the meeting correctly into the iCloud calendar.

  • Therefore, the calendar itself is working properly.

I also inspected the raw source of the email.

The message contains a valid calendar MIME part:
The ICS contains a normal VCALENDAR/VEVENT with METHOD:REQUEST , UID , DTSTART , DTEND , attendees, etc.

So the invitation is present in the email and is valid.

Expected behavior

When I accept the invitation, eM Client should automatically add the meeting to the iCloud (CalDAV) calendar.

Actual behavior

The RSVP is sent, but the meeting is not imported into the calendar.