Let's start again from the beginning I'll be a little bit verbose as you need to check the whole thing
Feel free to post screenshots for the different setup point and for the test scenario, if the test scenario is adapted to your case, modify it so it's adapted to your case
Setup:
1) One group with 3 users
==> Users are active
==> Users have "Notification" enable (on the profile)
==> Users have "Notification Preferences" active (at least for the given notification)
==> The group is setup so the emails are sent to the members of the groups and not to a "group email address" where the 3rd person would be missing
2) Notifications
==> Notifications is setup so no condition is preventing the email to be sent to the 3rd person
==> Is the notification sent to the event creator?
==> What is the weight of the notification? (empty, 0 or another number)
Test scenario:
1) Modify the incident to meet the conditions
2) Check on event logs that the "incident.update" event is triggered (it should)
3) Check that the email is created and sent (sys_email)
4) What is the recipient list? 2 users or 3 users?
