Geographic Location: Lost data after changing to location file of missing/renamed Region

Description

Prerequisites

• Two providers that return two different set of locations. See attached examples BigProvider and SmallProvider.

Steps to reproduce:
1. Configure geolocation provider BigProvider
2. Create a visitor group of Geographic Location criteria
3. Select setting fields for a region name that is missing in the second
e.g.: Select North America - United States - New York
4. Save the visitor group
5. Change geolocation provider to SmallProvider
6. Edit the visitor group above --> Region is empty
7. Select 'Any' for Region field
8. Select another value from Continent list

Expected: Reload Country/Region list matching to new selected Continent
Actual: Nothing is changed in Country/Region list. Nothing runs in Networks tab in browser dev tool.
Observed: Thus user even can select mismatched settings (e.g.: Europe - Sweden - New York) and save changes without validation error. When editing the visitor group again, Country/Region are empty.
Note: Clearing browser cache or restarting IIS doesn't help.