All screens go black during render queue - forced to restart

I’m now getting these weird colored splotches that show up after I have Unreal open for a few hours. As soon as I restart Unreal, they go away.

Does anyone have any idea what could be causing this?

I figured my graphics card was going up or something, but I just find it odd that as soon as I restart Unreal, the issue goes away.

Thanks in advance.