Game crashes when avatar walks past specific point

Game window crashes when in my main world, my avatar walks past a certain point. In all other directions the game seems to be fine but when I walk in one particular direction past a certain coordinate the screen will flash white and then the window will close. When I re-open the world, I will be back where I was loaded in when I previously opened the world with none of my actions (like repairing a bow or breaking a block) having been saved. Kind of like a tom hanks/groundhogs day situation