What happened to exo218 PyeongChang Winter Olympics?

exo rescue stick is controlled by the central control, that is, it can be operated by the organizer in the background to change color, which is a patent of sm Company. Exo fans were arranged in the very back area C that night, and the support stick was operated by the organizer. The whole performance changed color, and which group became the support color when it appeared. As a result, when exo finally appeared, the support stick in the hands of the fans did not light up, and it lit up again after the performance. Say it's a malfunction, who believes it? Obviously it is aimed at exo and fans' behavior.