Thought it worth sharing just came back into Thailand at Lao Border/Nong Kai - all was fine as I have a DTV but 2 others turned away for too many entries and another for not having an onward flight, though he was told you on showing proof he could come back.
Very unfriendly and certainly not a border I would recommend without having exact paper work/correct visa etc which of course one should have however if you are in that “grey area” best pick another entry point imho.