Uber chest from ninja event

I got an uber chest from the ninja event, opened it, and walked for a few minutes with the chest still open.

The game was cut off of course, that’s what happens when player don’t active for a few minutes.

I returned to the game and a wonder - the chest disappeared!

I don’t really care too much about the chest, (although it could be a nice addition of gold).

I just wanted to know whether it was a bug, or that there was some time limitation and did it happen to others?. Thanks in advance

 

OS - PC, Windows

Nope, chests disappear if you leave them open and log off. When I asked about this I was told the contents are turned into gold that is then added to your stash but I never bothered to waste a chest just to verify this.

So it’s best not to let this happen.