User Defined Group in the CMC, Permissions not Working

Hi All, is there anyone who has had the same issue as me and can shed some light on the underlying issue, or if it is a SAP bug?

I have created a User Group in the CMC and assigned the Metapedia Approver pre-defined role to it.

Then I add the User Group to a User.

In Information Steward 4.1 SP 1 Patch 1, I then submit a Metapedia Term to the Metapedia Approver.

However, I cannot see the submitted term in the User's "My Worklist".

However, when I assign the Metapedia Approver pre-defined role directly to the User, it CAN see the Submitted Task in "My Worklist".

What am I doing wrong?

Mike