Have your Muay Thai-related documents with you in case immigration asks any questions. It’s unlikely they will, but it’s better to be prepared. And if they ask why you were staying abroad, just be honest.
The ask:thailand community, consisting of multiple Q/A groups with over 100,000 members, powers this platform. It is not an official government resource. Our members actively contribute to this resource, and while we strive for accuracy, we cannot guarantee its complete reliability. Assistance to travelers is provided as a community service.