I am in the UK and applying for an OA visa to hopefully enter Thailand in December. I cannot/dont want to stay for 1 year so will book a return flight to return in 5 or 6 months time. I want to know if, when shown my return flight date, Thai immigration at Suvarnabhumi will accept travel insurance with the required Covid cover for the 5/6 months or will they insist on insurance with 1 year's cover?