Chaos Spawn’s pounce attack, a single slam with it’s right arm used at a close range, is doing only negligible amount of dmg when blocked with non-shield weapons.
It used to work like Rat Ogre’s pounce attacks and almost completely ignored blocks of non-shield weapons, which was reasonable because the attack is very short and used only at a close range, but now it’s more like a Troll’s axe attack which does very little damage when blocked.