After between 30 minutes to an hour, the game is seeming to crash by freezing, then dissapearing. Once it gave the "flatlined" error, but the the rest of the time it hasnt' How to diagnose and fix? I have never used mods. Came back to 1.5 and started a brand new save after a fresh download of the game. AMD 3700x, 16GB ram, RTX3070, Win 10 and lots of free space available on drive.