February 2019
Whenever I have Discord Overlay activated, the game no longer lets me use my mouse in game.
When I load into a match, the mouse is visible on screen and moving, instead of me able to move my character. The keybindings still work.
February 2019
I had this same issue. The problem turned out not to be Discord though. I turned off the Origin In-Game and that solved it. Funny that it was EA's own overlay breaking the game, but that one toggle got me back to playing right away. Discord's overlay works fine for me, but it is very sluggish.