Rhoa stun buildup

Every map since the new patch when i've sat on my rhoa and gotten knocked off a few times no biggie but i notice the stun bar besides my hp never goes down can this maybe get looked into

This is happening to me too. I have seen multiple posts saying to get off the Roa and the stun bar will drain over time. This does not happen. I have been sitting off my Roa for about 5 minutes and the bar is still full. This makes it to where any attack will heavy stun me, even if I am on the ground. The only way to reset this bar for me now is to leave the instance and come back. The bar gets 100% full after 1 normal attack from a white mob...