I believe the issue was with Argentina having many general purpose bombs but very few retarded bombs in inventory.
A bomb is not immediately armed upon release, doing so risks destruction of the aircraft should the bomb go off too soon after release. The armorer sets a delay such that the regardless of fuze setting, the bomb will not go off within a certain minimum distance from the releasing aircraft.
As I recall, Argentinian fighters were initially making high speed low altitude attacks against British warships. The Argentinian pilots combination of high speed and low altitude attacks resulted in many bombs not having enough time upon release to arm.
Regardless of fuze settings, many unarmed Argentinian bombs struck British warships and because they had not yet armed, would pass through the ship with minimal damage (excepting personnel and equipment directly in the bomb and spall path)
Thank you. That makes perfectly good sense. It is obvious you worked in the business.