Not sure if this is a Steam issue or a Bungie issue, but when I'm in D2 (fullscreen), I type a whisper to a friend and hit enter; upon hitting enter, my game is minimized and up comes the Steam chatbox for that specific person I'm whispering.
Anyone else having this issue?
I've tried looking in every possible place hoping maybe it's a setting but I've had no luck fixing it on my own.