@Dev_VKC I just had a really weird pvp bug where my gorgowing killed the last bronzeshell, died to its passive, and then the game froze. When I reloaded the game, I got this message.
I reloaded the game again and now everything is running smoothly. No one else has used my restore code.
Edit: I should add that the battle ended in a draw even though I had plenty of monsters left when I won