My friend found it by accident. he want to share this to push Blizzard fix it asap to prevent any inappropriate use of this exploit.
How to duplicate:
1, Accept party invitation while open your repository - transfer to team leader’s world and do not close the repository.
2, While repository opening, use Infernal Compass Tier 8 Key and go to map - teleport to Infernal Compass.
3, Die in the Infernal Compass, do not click revive.
4, team member revive you - open your invetory, you will see your repository items
5, trade your items to team members
6, log out the game.
7, log in the game - some of the items your traded out are still existing.
My friend’s BN: XIAOSHAN#31943
Waiting for your confirmation