@Rusty *****
Yeah and it's clear he has no real clue what happens when you travel in/out of Thailand on a multiple entry visa.
He mentioned the whole "have to stay outside of Thailand for at least 1 night" thing, but that appears to be applied ONLY to Chiang Khong, not Thailand as a whole.
While I almost always spend multiple days outside of Thailand, on the occasions I've done a day return trip (usually to Myanmar, before Covid that is) it was because those borders only allowed me to spend one day there without a visa.