Just bought the software, had this happen. Seems to happen when looking at certain software while others are playing in the background.
My example, I was working on Hexels (art program), while having youtube up in the background. It also happened when trying to play The Division.
Not sure how the software is picking up audio from software, but it's still sadly an issue.
Update: After some fiddling around, it's not picking up audio from other software, it's just doing the Phantom Talking™ on its own. However, I think it may have to do with multiple monitors. If I have said program (example, Hexels) on the main primary screen, the avatar starts going off on it's own. If I have the software open on a different monitor though, it behaves. If I move my primary monitor to a different one, the issue seems to go away for the most part, excluding a few minor glitches? I'll continue fiddling with it to see if I can't find a work-around until an official fix can be had.