Update email/Answer email is replicated when user updates the recurrence event has exceptions

[tlle14]

Precondition

How to make a recurrence event with exceptions:

1. Owner creates a recurrence event
2. Owner invite Attendee to the event
3. Attendee declines 3 exceptions in the recurrence event
4. Attendee changed his mind, then accepts all items in the recurrence event.

Actual Result

When Attendee accepts all items in the recurrence event, it sends the number of emails equal to the number the exceptions

When Owner update the event, it sends the number of updated emails equal to the number the exceptions

Expected Result

When all items in the recurrence are updated to a same state, the system should send only 1 email about the change (answer or update the event)

Environment

DEV Platform