Zardnaar
Legend
He only goes after one of the two sabers. The second blade(not hilt) hits his helmet and shorts out, making it clear that it has something to do with the metal. Sure you don't see what he did to the first blade when he blocked with his bracelet, but you do get a clear look at how the second blade goes out.
Alot more obvious on the rewatch.
I'm fibee either way mo big deal if it's cortosis or Dark Helmet damaging them.