Here is my understanding of how to fix this. When you prestige you have to go into all the new prestige slots to activate your specialist equipment. Go to Create A Class. then go to the Equipment Button (it's under the Gear Button). You have to click on the Special Issue Equipment Button (looks like a shield) to activate your specialist equipment or else it just defaults to off on that loadout slot. You have to redo this every time you prestige since all your slots will default to off again. Hope it makes sense.
Here is an image I hope helps. See the yellow triangle in the corner of the Special Issue Box within the equipment menu. You have to make sure that is activated on all your loadout slots. You have to go back and do this every time you prestige.
Mine just started doing this last night... Any word on an update or fix for xbox users?