Guild Wars 2

The attack where risen pirates drink some booze and then throw it at you to create burning ground.

I have noticed this attack is uninterruptible by an engineer via air blast (has no effect on them) and also ranger greatsword with hilt bash (also no effect).

The interrupts were attempted during their drinking animation.

This is very easily to reproduce – go and try to interrupt a risen pirate when it drinks to prevent their flame attack.

Yes, I’ve noticed this behavior as well.