Augmetics and Armour

[The Canterbury Tail]

So one of my characters, after an unfortunate incident, now has a TL11 Combat Arm. Now this is in the Central Supply Catalogue in FG so that's good. The question here is, how do I get the +4 armour the augmentation provides to factor into the system under the character sheet, it seems only actual armour is counted (cloth, Reflec etc.) as does things like subdermal armour augment, but not the combat arm. Is this just an error and the CSC needs updating for this item to give it an Armour modifier or so I need to do something manually? I tried editing the record on the character sheet for the item to add the modifier, but it doesn't seem to factor in.

[The Canterbury Tail]

The workaround doesn't seem to, well, work. I've logged a bug.