I know that when I've played with Block, or considered it conceptually, I've thought about it as if it had something like the autonomous ability, like Dancing Scimitar, and therefore would unaffected by conditions on the creature it's attached to. This isn't spelled out like that in the rules, obviously, but it seems like we all have the same natural expectation for the card.
Why would stunning my wolf prevent the magical protective bubble from working? But obviously rules are separate from theme.