From what I have read, you could be given the chance to fly to a nearby country rather than sent back to Finland.
But to be honest OP, you have been out of Thailand for several months. I would not worry about that. Mostly denials happen when people live here back to back and never exit the country. Just prepare yourself to answer questions, 20k baht or equivalent in cash, flight out of Thailand during 60 days, and some hotel booking. Before you get denied you will most probably get a warning first, to switch to another type of visa.
I have been coming and going to Thailand since 2015 (excluding covid years), and so far I have only been questioned why I am here so often during 2019, a time that was quite notorious for that. And that was with a visa exempt flying in. Best to have a tourist visa when you fly to Bangkok, it is much better than just an exempt.