I was using symbiosis on our Holy Paladin for the extra poison dispel towards Corrosive Blood. The Cleanse I gained wasn't working on it though. It would burn a GCD, stay off CD, and the debuff would stay on the target. I made sure it wasn't a targeting issue with my mouse-over macro, clicking on the dispel target and then casting Cleanse.
Is this an intended effect, or a known bug? Is there a work-around?