Many, usually anonymous, who report questioning or other difficulties entering Thailand on a DTV tend not to mention their previous immigration history as well.
it’s not a new immigration act. They just temporarily stopped asking people arriving by air to fill out the paper forms. Now it’s back and is an online process.
You may already know this, but often different immigration offices have slightly different requirements. It’s always worth asking for a list. They have lists. 😊
They can also advise you how to get any kind of different visas/extensions you might be thinking of.
If you speak to them directly you won’t be wondering what’s going to happen at the ‘big bad immigration office’ or be convinced by agents that it’s all so difficult so you need to pay them to do it for you.
to clear up any confusion, rather than going to agents, it might be best to go to the immigration office you might use for an extension and ask them. They won’t bite you.