Did it with US passport a few months back. Kind of tedious procedure to fill out and submit all has to be through mail. Had no issues arrived to the quite island a month and half later 🙏 chokdee
I had a similar experience my second time here Dec 2019. Officer told me next time I would need a visa. This last time Sept 2022 there was def some not friendly vibes. All visa exempt entries, and extensions (3). It seems there is some type of small print that discourages a certain amount of exempt entries or a culture thought I am missing.