What happened to Exo20 18 PyeongChang Winter Olympics?

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