Reaper Shooting At Mission Start

As the title said, I'm getting a weird issue where, at the start of every mission he is deployed on, typically before I have control and while Bradford is giving the brief, my Reaper will randomly fire a single shot for no reason. It doesn't have any gameplay implications as far as I can tell, and it really isn't a big deal, aside from scaring the shit out of me every now and again when I forget about it, but I thought I would bring it up to see if anyone else is experiencing the same thing.