After sharing a video on her YouTube channel showcasing a flea market preparation at her residence with the attendance of artist friends and some ONF members, Lee Chae Yeon, the former IZ*ONE member and now a solo artist, was faced with criticism from ONF fans. They deemed it inappropriate for the ONF members to feature in unofficial content so close to their solo concert scheduled within a week.

In response to the backlash, Lee Chae Yeon issued a detailed message on a fan platform, defending her actions. She clarified that she always ensures positive intentions when inviting guests on her channel and that all content is carefully reviewed before posting. Addressing the flea market issue, she explained that despite prior notification, her company later requested the preparation video not to be uploaded. Expressing frustration, she questioned why others involved were being penalized.

Lee Chae Yeon disclosed that the flea market timing had been adjusted to accommodate ONF, even though she initially proposed canceling it due to scheduling conflicts. The event was arranged around ONF's fan signing event, and she took pains to coordinate guest appearances accordingly. She expressed disappointment over the situation, maintaining she would not invite them again to prevent similar misunderstandings and took full responsibility for the incident.

Acknowledging the criticism and promising to remove the video if requested by ONF fans, she emphasized her support for fellow artists. In a follow-up message, she addressed her emotions and expressed regret and responsibility for any distress caused. Lee Chae Yeon urged for calmness and mutual support in the face of differing opinions, pledging to act thoughtfully in the future to ensure pride in her actions.