So me and my friend tried to test if Gorka Helmet can protect him from getting knocked down, his helmet was in "damaged" condition and after punching him directly in the face about 3-4 times his helmet condition changed to "Worn", punched him a few times more and the helmet was "Pristine". Punched him again and it became "Ruined".

For me it appears as some weird integer overflow.

There's also a second bug, punching directly in the face when a ruined gorka helmet (without visor of cource) is worn will not knock down that person, but if you punch that person directly in helmet he will constantly go unconscious.