They have to enter you into a system and provide a screenshot. It's the law and you might have to insist.
Alternatively, in the immigration office they have some other forms you can use to file for a TM30 yourself using other documents you can get from the landlord or hotel presumably but it's easier for them just to do the TM30 for you.
I'm trying to find the best place to go get another tourist visa soon like yourself, and heard there are issues recently in Penang. Please let us know if you manage to get one in Taiwan or elsewhere.
This was before covid back in 2019. It was a crabby immigration lady at DMK I later heard stories about that she has a reputation for making reasons to hassle people. Unfortunately I didn't have all my documentation ready which could have smoothed out the situation. While she said I was denied due to "too many visas" she seemed to presume I was working illegally and told me not to come back for a year, and only with a work visa. I read the stamp she put in the passport which actually said I was denied for not having
*****
baht cash on my person. However, since then I prepare extensively by bringing
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cash and tons of documentation. DMK/BKK are known for this entry risk if you have a lot of visas.
There is a "Fast Track" service offered by Thai Visa Centre you can pay for in advance to ensure you will have no problems on arrival. They check and approve your situation before you travel. I have used it and recommend it if you want to come through BKK/DMK. That's probably the best option if you're coming from Taiwan. (Note that other companies offer a cheaper fast track service but they don't do the preapproval, just the accelerated processing line.)
I have heard that entry through Phuket, Surat Thani, and other regional airports are also easier than Bangkok. Tourist island airports like Samui or Krabi also have a reputation for easy entry but the flight prices are higher.
Once I was denied entry at DMK for "too many visas" and they were clear I was required to book a flight back to the country I had just come from (not home country.) Fortunately it happened to be Malaysia, so it was inexpensive to just go right back then came back in through a different airport without problems.
Does anyone know if there is a difference in service provided between the fast track vendors? Klook is 30% the price of tvc for example but perhaps you get what you pay for.