I think he's talking about the FSI/FSII rematch crystals in Heins throne room. If you talk to them and hit escape or c, then it doesn't close the menu where you select your opponent, rather it sends you into a battle (example: FSII rematch will send you into battle against the Crimsonwood team).
It's not necessarily a bug; you just have to go through all the pages until the "Nevermind" selection.