After my last not-so-great experience, today I completed my fourth entry on DTV. It was also my first time arriving at DMK Airport.
There was a long queue at immigration - I had to wait around 90 minutes. When it was my turn, I handed over my boarding pass and passport to the immigration officer, an older lady probably in her 50s.
She asked to see my visa letter but didn’t ask for the TDAC.
No further questions were asked, and she stamped my passport in under a minute.