9.1.2 node bug

F_kabam

Quest name Welcome Wagon. Throw Down 2 node says, in short, when a science attacker gains fury, they gain unstoppable. Nothing about a cool down or further conditions. Every time I go into a fight, there’s a 50/50 chance that I will actually gain the unstoppable when gaining furies. Sometimes even randomly kicking in halfway through the fight. Is this a bug or am I missing something?