Yep when I got a resident certificate recently they weren’t happy with the end date not being filled in (and therefore stay showing as 0 days). I just made a new one with my wife and all good. But it’s a bit annoying I’ll have to remember to make another at some point…
essentially I think the decision for a lot of people looking to extend is “can I be bothered with/do I want to find flights and possible accommodation out of the country for less than 10k”.
Great visa for those who want to use Thailand as a base and travel around a bit!