there was no information available about S. Coups from Seventeen going on hiatus to receive treatment for anxiety. It's important to note that my information might be outdated, and developments might have occurred since then.
If there have been any updates or news about S. Coups and his hiatus, I recommend checking official sources like Seventeen's official social media accounts, their agency's statements, or reputable news outlets for the most current and accurate information. K-pop idols' health and well-being are of utmost importance, and any decision to go on hiatus for medical reasons is typically made to prioritize their health and allow them to receive proper treatment and support.