I would go ahead and send them in because you've got Memorial Day and who knows if there's any Thai holidays, the embassy in DC is closed for All American and Thai holidays.
They are very picky try to find a local or state rep.. We had to go that route with GEHA(government employee health administration) you MUST have 3 names and signatures on the foreign insurance form as well had a letter stating you have $100,000.00 in covid coverage..