Notifications is not generated on clients under a group with square brackets on the group name.
For example, if you specify group name "[O]test" in [Group] field, notification is not genarated.
This issue is fixed in Symantec Endpoint Protection 14.2 RU2 MP1. For information on how to obtain the latest build of Symantec Endpoint Protection, see Download the latest version of Symantec software here.