My visa exempt entry to Thailand at the Nong Khai post was declined today.

I obtained my new US passport last year. I flew to Thailand twice last year, got 1 extension of the two exempts. And used one border cross from last year. This was going to be my very first entry to Thailand in 2025, I am very surprised to be declined. Did anyone have a similar experience lately ? Supervisor said I stayed too long in Thailand, he said I should go back to Laos and fly to Thailand. But on the paper he gave me he marked (1) and (3), I think meaning they think I work in Thailand, which is nonsense, I don't work. I think we are back to pre-pandemic days, Thailand does not need repeat tourists anymore