Though I don't agree that this a bug, it is def. something that needs to be rectified. The Operation: Denova: Explosive Conflict was introduced in Update 1.2. The 'change' to Crushing Blow was not introduced until Update 1.3. Setting the Shield as being CC'd wouldn't work because of how Firebrand's Mortar Volley ability works. There is a solution to this problem, other than not using the ability as you would pre 1.3, but I am unsure as to what it is.