World border corner texture extends too far outwards

The world border texture extends too far outwards on the outer corners of the world border. The extended texture is only visible by precisely aligning yourself with a given corner any distance from the outside of the world border.

I have attached a resource pack to turn the world border texture solid white, for ease of visualization/replication (worldbordertexture.zip), as well as a video with the resource pack applied showing the bug in action (worldbordertexture.mp4).

May relate to MC-248304, which impacts world border collision behavior 1 block out from any corner.