It happened to me. I actually went to immigration to do a 30 day extension. When they saw that I actually only need one day they said no need to do it if it is less than 24 hours. You will get a stamp saying overstayed by less then 24 hours and no fine.
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.