I was just in Koh Samui for 89 days, flew to Singapore for 4 days and back to Samui, not a question was asked. Stamped in as normal for another visa exempt entry.
I mean I have zero issue at all with doing this as it will probably take a minute or two out of a single day.
But when talking about time, how much time is this going to add onto the sometimes atrocious lines in BKK or other airports when it comes to the already very slow
Immigration personnel having another step or two of documents to check before stamping.