Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

I've been playing around with characters that have auras and I've noticed that they stop working at times. It usually occurs when stunned, such as when I fail a Will save against Illithid. However, sometimes it stops working when grouped with another character that has an aura, such as a Bard. Although a pain in the ass, cancelling an aura applied by a War Drummer can be reapplied again by recasting. It can take 2-4 turns since it can take a cast to 'cancel' the aura first, both for the fear and chant, each. The biggest problem occurs with the Blackguard's aura since they must rest to get it back. Is this functionality intended?

I also should have added the Bodyguard auras to the list of class auras that stop working.