Losing keyboard access after several minutes

This is only happening in D3 as of yesterday. After some play the keyboard becomes unresponsive and I need to reset it in the USB port for it to work again. It also stops working in other apps when this happens. Again, only while playing D3 - not any other games like POE, LE, etc
Game is unplayable this way!

On your Necro, by chance?

Yes - and boulder barb