When playing with a friend on Xbox One we have encountered an issue where our nether portals will not stay linked with the correct corresponding portal.

     Example being that we would enter Overworld portal A and come out at portal A in the Nether as expected, now the issue comes when we lit Overworld portal B. When we lit Overworld portal B we came through Nether portal A as expected we traversed the Nether to the proper X, Z location and built Nether Portal B and went through it, we came out At Overworld portal B like we should, but now anytime we use any Overworld portal it is placing us randomly at either of the Nether portals that have been built, and vice versa, we use a portal in the Nether and we are placed randomly at an Overworld Portal we have built.