The IOI girls were guests on the 11th's episode of 'Immortal Song'. However, the photo that the staff used to introduce IOI was wrong - the photo included 'Produce 101' trainees such as Kang Si Won, Yoon Chae Kyung, Kim Na Young, and Kang Kyung Won that didn't make it into the group, and left out girls such as Kim Do Yeon, Lim Na Young, Jung Chae Yeon, and Zhou Jieqiong, girls who were actually in the group.
The PD of the show said, "It's no doubt the fault of the staff. The staff were looking for a photo to use during the video, and used a photo made by the fans. It's the fault of the staff who didn't confirm the photo. We're sorry to both fans and IOI. After we realized that we used the wrong photo after the broadcast, we fixed it right away. For videos that will be provided for the 'rewatch service' or for rebroadcasts and cable broadcasts, the edited photo will be used. We're thankful for IOI for putting on such a great stage."