@Alexander ******
funny, CW told me the opposite. Leave the country, had to file tm30. Travel in Thailand, no issues. My girlfriend works for the government in the building and was with me when I asked. She also asked in Thai so they were sure of what I was asking. Just depends upon which office and what person you ask. When I travel, inside Thailand, I don’t file. But before I do my 90 day, if I have traveled anywhere, I always do a new one just in case.