Solved lost item by game bug

This is known for many years and although most of the time it could work it is never recommended to leave a game and create a new one while holding an item in your hand because you could lose it. This is most likely due to the fact that you are still able to pick other items although your inventory is full and Blizzard shouldn't have allowed carrying more items in that case because when you're holding that item and you leave the game the save file doesn't really have a record for that item since it's not stored in either of your character's available slots so bring in a mule character into the same game since you're allowed to open multiple game instances here anyway and trade the item to your other character instead. The game designers always recommend storing your items inside your inventory, cube, stash, etc before leaving the game and not keeping them in hand or leaving them on the ground in a non-perm game.

I see your message in the main channel last night, but I have not received any whispers or PMs from you. For such inquiries, send me a private message here with all the information, including the date and approximate server time this occurred as well as the game name, and I'll take a look. If you haven't joined multiple games afterward and logged off right away, there's a chance it could be retrieved.

/edit The item has been found and recovered successfully since the user hasn't joined any games and logged off from the account right away. Don't attempt such old school tricks in the future as this was never an intended method to be used and is a well known way to lose items in the game besides, no server being either private or official would help out with restoring lost items under any circumstances.
Bring in a mule character or a secondary account and trade yourselves the items if you don't have any inventory space left.