On July 16, FNC Entertainment delivered heartbreaking news to fans regarding RO WOON via SF9's official fan site.
The agency said, "In the evening of July 15, RO WOON felt back and knee pain while actively on a schedule with the members of SF9."

They went on, "Therefore, it was decided that RO WOON's activities will be adjusted. As his doctor said, we felt that his body needed a break in order to recover fast. Until he recovers, we will make sure that he does not participate in any activities that involve intense dancing."

They explained, "It was delayed so that SF9 can show you a better performance in the future. We ask for your kind understanding."
Lastly, the agency stated, "Keeping our artists healthy is our top priority, and we will do our best to ensure RO WOON recovers quickly and does not get any worse. We will continually inform you on RO WOON's progress in recovery and what will be decided regarding his future activities."

(Credit= FNC Entertainment)
(SBS Star)