Guild Wars 2

If you get taunted while you have resistance, you will no longer be able to target anyone else, forever. Unless you get taunted again while not having resistance. Or if it was ranger’s pet taunt, if the ranger swaps pets.

I can confirm this applies to both taunt from the beastly warden trait and taunts from the berserker warrior specialization, though I can’t confirm if resistance is what conditional modifier results in this behavior at this time.