Protip to anybody who wants to spend an extended amount of time overseas - you’re looking at a strong opportunity to join the list of people who have their accounts closed. Red flags include quantity of overseas debit card transactions, setting a PO Box (this one apparently is a very big red flag to banks) or a PMB as your bank address, lots of wire transfers. Open multiple bank accounts at different banks, use servi…
Of course, that doesn't help if you don't just look weird but actually are weird. Spending a lot of time overseas is not weird in itself, because it's common enough. Some specific international situations are weird. Because such situations are rare, it's not cost-effective for the bureaucracy to develop processes for dealing with them fairly.