An Unreal process has crashed

Getting this since Beta 2, game freezes and crashes every 20 mins or so and this pops up. Can't seem to find a pattern as for what I was doing just before the crash, sometimes I was vaulting, sometimes shooting, sometimes just simply sprinting.
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GTX 970M 3GB
i7 6700HQ
Almost every in-game graphic setting is low

Like the other thread said this can be fixed by setting the game to window then back to fullscreen, but you have to do this each time you run the program. Hopefully this can help you guys pinpoint the issue!