When I try to create a new world, with the (Old) with the output, I keep getting a shaded gray area all the way around within 20 seconds of running from the landing zone when you spawn in. If you want a picture I can show you..

I can play on Infinite all I want, and it doesn't screw up, but when I play with the old as the output when I create the new world, I can't even go anywhere. I know the grey represents the border, but 30 seconds away from the starting point? Really? In all directions, My chunk count is the highest, I try the lowest and same result.

This is stupid!