I got my DTV approved on 9th April from thailand embassy in HCM vietnam then arrived at Bkk airport on 10th April no question asked the officer did not even look at DTV visa on my phone as I believe it’s already on their system when they scan my passport. I left bkk on 13th May through autogate then came back to Bkk on 17th and again no question asked as quick as hundred of times I entered Thailand with visa excemption.