His melee bonus health is not calculated properly(?). For example, when I bought Boundless Spirit and Spiritual Overflow, it showed the actual amount with Spiritual Overflow activated, even though I hadn't activated its passive.
If you hold down the punch button (heavy punch) in a small timing (after pairing and before the punch is blocked) at the moment of pairing (and you pair the attack), the sound of a heavy attack will not be played. This error works on all characters and all blockers (heroes, guardians, troops)...