Got the same issue as well. Game just randomly hard locks with no crash to desktop error. Audio of the game keeps playing but the image is hard locked. Can't do anything unless I restart my PC. I tried older Nvidia drivers and this keeps happening.
There is no crash error to report or any other prompt windows. The game just freezes there with audio keep playing.
Windows 10 Pro x64 i5 2500K Nvidia GTX970 G1 Gaming 8 GB RAM.
It's very annoying and happens to me only the last 2 days.