Resolution: Awaiting Response
Minecraft 1.9.4, Minecraft 16w21b, Minecraft 1.10 Pre-Release 1, Minecraft 1.10.2, Minecraft 1.11.2, Minecraft 1.12, Minecraft 1.12.2
Crashing/quitting while loading the nether, teleports player to the overworld coordinates IN the nether
A player on my server discovered this by having his game crash when he
entered a portal into the nether.
He re-logged and ended up at his overworld coordinates, IN the nether. 8 times the distance away that his portal should have put him. The other players attempted to replicate this, and a group of them springboarded across the nether using this glitch and ended up quite easily at the world border of 30 million, leaving a trail of portals each 8x further away from the last.
I have not found any mention of this glitch so I made this report, and have not tried it myself, but will do so shortly to reproduce it for any questions.
Attached a screenshot of some of the players building at the world border.
I tested it myself, hopped into a portal, pressed F4 when the nether began to load and got teleported far into the nether to the overworld's coordinates upon re-logging in.