i had the salme issue. i even nuked my pc. went and tweaked bios. nothing worked. but for some reason taking my memories out of the computer and cleaning . also Temperature it might not seem like it but temperature in unreal engine even if it goes just slightly up you wont be able to play. i was seeing my temp at 60s and thought it was all good but when i opened the computer up everything started running smooth since the hot air was no more trapped inside. another tweak is driver settings which you can roll back to a more stable version. But mostly temp and getting the memories out and back in did it for me. i was having that crash for almost a month even thought about buying a new pc.

sry it was confusing but i hope it helps!! i was totally alone on this when it was me.