Controls visualization -- Filter occuring on field, which doesn't exist in any document

Hi, I am trying to create a control widget. However, I am having an issue with many of fields: with .keyword.
As you see in the pictures below, It doesn't let me select However, you can see that the field exists in the data. Like I mentioned, this is the case with almost all .keyword fields.
Kibana --> Version: 6.4.1

Please help me with identifying the issue.

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