I had the same problem a few years ago, Chiangmai immigration processed my application early, however my wife had to write a letter asking them to do it. It wasn’t a problem Cnx immigration were very helpful.
I have the same problem , however they used the ID number of my Pink Card in addition my Nationality is now apparently Thai. When I suggested to my Wife that we go and get me a Thai National ID card I got the look that is reserved for my most stupid moments.