Notification email resend after the user changes his answer to the event

[tlle14]

Precondition

The event has a reminder

Actual Result

After the reminder/ notification email is sent, if the attendee change his answer, the notification mail is sent again
The attendee changed his answer:

The notification emails are resend

Steps

1. UserA creates an event and invite userB
2. Then the event sends to userB a notification email when the time comes
3. After that, userB accept the event
4. Verify the notification email is sent to userB again
5. UserB changes his answer to "Maybe"
6. Verify the notification email is sent to userB again
7. And so on...

Expected Result

The notification email shouldn't be sent after the attendee changing his answer

Environment

DEV enviornment