I built a nether portal on the coordinates 891, 63, 1038. As soon as i entered it, the game crashed. I tried again. Same results. I had to travel thousands of blocks to get to my home base, to find that that portal actually works. The seed is 936459506. I am providing the seed because all of my other worlds, Creative or survival have the nether portals working at this location. Please fix this in the next Hotfix or Minor update.