We've noticed that when adding/removing members of a CAB, the modified member does not get the approval email if the change type is linked to a workflow. 

Example: New member is added to CAB, new change ticket is created, approval request is triggered to the original members but not the new member. New member can be manually added to the approval list and sent the notification.

Fix: the workflow approval step needs to be recreated to have the new member receive approval notifictions