Emergency contact import->Invalid state issue

1)Login with Partner credentials
2)Search and select company
3)go to import/Export
4)Create emergency contact template.
5)Import file of emergency contact
6)File went to bad with validation message " Invalid state" for both primary state and secondary state.
Tested for United Kingdom with state:Angus,Berkshire

Actual Result:Mapped state file goes to bad with validation message "Invalid state".
When state is unmapped import is done successfully.

Expected result: file should be imported successfully with state