Lookup country tag is not working

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Hello everyone,

We have created a custom field under the Additional Assignment Info section. Firstly, we have created a Lookup with the needed values and provided a country tag to restrict the visibility of a value to a country

Then we have created a value set that retrieves the lookup type

Then we have created an EFF under PER_ASSIGNMENT_EIT_EFF, in which we have used the value set that retrieves the needed lookup

However, we found out, that in the UI, we can still see the value that was supposed to be restricted by the country tag. For example, in the common lookup we have excluded CH from seeing "Zero-hours Contract" value, but in the UI the user can see and select it.