When I am using DX11 I have an issue where my keyboard inputs are unresponsive. This is happening when moving my character, using skills, or chatting. It's not very consistent either. If I just hit the 1 key to activate an ability on my hot bar I can see it light up sometimes immediately sometimes its delayed.

I can play like before using DX9 but I'd prefer to find a solution for the DX11 problem since I was looking forward to those features.

If it helps here are a few of my specs:
2560x1440 Resolution
GeForce GTX780
Intel Core i7-4790k @ 4GHz
16GB RAM
Windows 8.1