I created an old world and flew to the edge of the world. However, the boarder is glitched due to the fact there is a special pattern in it. It makes that there is no feeling of finite.

What I expected to happen was that the border is empty. However, glitched blocks can be seen inside the boarder like water patches, and you can even get into the bodies of water (near the edge). These blocks can be deleted but you are stuck forever in the invisible bedrocks.

Steps to reproduce:
1. Generate an old world
2. Fly to the edge (It happens sometimes and very likely, it can be seen if parts of a tree stuck in the border) and you may see patches of leaves and water

Please fix this ASAP. Thanks!