Why bkk? Seems others are saying chiang mai
I was stopped at BKK on this visit by the head shaking Imm officer flicking through my passport pages, taken to the supervisor desk and shouted at and harangued for having 2 covid and TR visa extensions in the last 2 yrs .. told to get a long term visa not a TR visa and given contact details of a 'visa consultant'
I was entering on the 45 day + 30 days extension they did not like that one bit .. had to fill in a form to give extra personal details address phone email hotel and warned if I try to to enter without a visa again I could be Deported!!!!
So I would recommend entering at CNX next as I would be doing ... they obviously have something going on at BKK