ToME: the Tales of Maj'Eyal

Had an interesting moment in the Rhaloren camp. A rare wolf was fighting the Rhaloren, one of which was a caster who used Shock spell projectile. While it was in midair, the rare equipped with Shantiz dagger attacked him and exploded the projectile for AOE lightning damage. I was racing over to kill the rare with a movement infusion and had the free action buff, giving 100% immunity to dazes, as the tool tip describes. Yet I got dazed by the lightning explosion.

I was not under any debuff, nor did the rare have any ability which would reduce my daze immunity.

Bug?