I've tried figuring out when it will crash. I've realized my issue:

It only crashes when I save the game and go back to the main menu to quit. It crashes when I say YES to confirm I want to quit.

I have tried to see if it would crash any other time by:
1. Booting up the game to main menu then quitting the game without loading - Did not crash
2. Loading the most recent save, play for a bit before it autosaves again or before I create a manual save, then quit the game - Did not crash

Any idea as to whats going on?

Similar problem but I didn't check if the whole save thing is involved with me. But I run an Epic version so it's a bit weird for me to ask about it here.