Hello may I know is HKT airport operates 24 hours at this moment? can traveller overnight at the airport to catch an early morning flight on the next day?

I have heard from some that most of those getting denied entry (and receiving the red stamp) despite having a proper visa are those traveling by air into DMK, BKK, and HKT in Phuket. I’ve also heard that land border crossings are typically your best bet to avoid this complication. Is this correct advice? And are the problems happening particularly at these airports or just airports in general?