Just testing my shipping for a logged-in customer on Magento 2.2.5
When I come to the checkout I get the following error.
Please check the shipping address information. Invalid value of "183" provided for the regionId field.
An address that I previously used is going through fine but this seems to happen when I try to enter a new address. A screenshot is provided
Having tested this it seems that this error occurs when the billing and shipping addresses are in a different country.
I realize that it would be a rare occurrence when the payment method is registered to a different country to a billing address but I wondered if there was any way to get around this for instances where the user is in temporary accommodation (working in another country for example) or is ordering for someone else (for example if someone in Northern Ireland is ordering for an address in the Republic of Ireland then they would technically be in a different country).

Still unsure how this has occurred but for now seems to be a good workaround
– CJNotts Sep 12 '18 at 09:21