I don't know if this is new, so please let me figure this out without rude comments.
It seems that when you have cc immunity and you pop a immovable potion the cooldown granted by the potion will not be included. The cc immunity of the break free will go down with his own timer and you'll be vulnerable again.
Is this intended? Is this new? Sorry if this a know thing, I just want to understand the mechanic and improve my gameplay