Stock (on-hand) Items not updated after using Composite items

Stock (on-hand) Items not updated after using Composite items

Hi there,
I created a Composite item (consist of 3 items).  After I created the Composite item, I invoiced it and shipped the items. However the actual stock on hand of the 3items didn't change at all.

Have you guys encountered this?

Thank you

Regards,
Wes