Drax's medium attack on limber and against Blade.
When you parry Drax's double hit, it counts as two parries. So, on a limber node, you can only parry him once with enough time to counter since the second parry counts as the fourth.
On the flip side, if you parry him with Blade, it places two bleeds on him.
Is this a bug, it is it working as intended?