Referencing label column of table from EnumList Ref column in a different table

If I have an EnumList Ref column and I call out the Ref column in a report using the format of <<[RefColumn]>>, it will print the list of the appropriate values from the key column of the referenced table. I understand that part. But what if I instead want to print the values of the label column of the referenced table? If I use a list deference such as [RefColumn][OtherTableLabelColumn], that field in my report just shows up blank. Why is that?

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