I think I found another bug.
I have two regions, zone 1 is UK in the Northern Ireland part(county Antrim, Armagh, Down, Fermanagh, Londonderry, Tyrone) and Isle of Man (Country), and zone 2 is the rest of UK (without Norther Ireland).
When I select any county in Northern Ireland, the system works fine; however, when I select Isle of Man, then it doesnt work. I checked and when bringing zone 2 UK cities then works fine.
In configuration, I tried to select again zone 1, this means selecting Isle of Man and then ALL, and then UK and then county Antrim, Armagh, Down, Fermanagh, Londonderry, Tyrone. Also I tried selecting UK and then county Antrim, Armagh, Down, Fermanagh, Londonderry, Tyrone and then Isle of Man and then ALL. But it seems that neither of any of these approaches bring a successful quote when selecting Isle of Man.
Any suggestions, please?