That would make sense if a Striker added to your combo but it doesn't so it shouldn't be classed as an attack. It should be one or the other
Korg's shield is chipped away when specifically struck by LIGHT Attacks
Korg's shield is chipped away when specifically struck by LIGHT Attacks - striker attacks won't count as LIGHT, but some other type. Whereas Thing just needs to be hit - doesn't matter by what.