It's been highlighted that when using dynamic fields (say 3 fields, Country, State, City) the data in the child fields does not automatically clear/populate when changing the value of the parent field.

For example, imagine I choose Country = USA, State = California and City = Sacramento but then decide to change the Country to UK, the values in the State and City fields remain so the data is invalid. This only seems to occur when the field data is cached via the attribute (CacheFieldValues=Yes). If this setting isn't enabled then they work as expected.

Is this intended behaviour or due to a technical difficulty in implementing it?