At first I tried it with the Tunnel Fighter mutation and confirmed it doesn’t work by fighting five dogs with a character having max melee and unarmed, and naked (to get the max reaction score), while using No Style. Can block only once, never blocked more than that in a single turn.
Tried it with a spell in Magiclysm called Electric Eye or something which should give you a BONUS_BLOCKS too, it didn’t work as well.
I’ve created an Issue in github about it awhile back, starting a Topic here to ease my mind and try to get it some attention.