I agree about Bangkok Bank.I've been with them for many years and my Wise transfers always shows up as international/foreign. Even before Wise added "Funds for long term stay in Thailand" as reason for the transfer in 2019..
Having a bank account in one province and staying in another makes no sense whatsoever. It will eventually bite you in the ass.Of that I'm quite sure.There are also bank branches that won't issue for example a bank letter if you're not a customer.
Officially,when sending money and you want those transfers to show up as international/foreign, you must use either Funds for long term stay in Thailand or Property Purchase. Did you use these reasons for your transfers?