Going through a nether portal, then back through it to return to the overworld, causes a new nether portal to spawn randomly in the overworld, NOT in the location the original portal was built.
Obviously what was expected to happen is the player should return through their original portal. For instance the portal was built inside a house, the player should return back inside their house and not in a random location on the map.
Duplicate of MC-1403, please use the search function to see if your bug has already been submitted. Currently over 50% of tickets are being closed as duplicate.