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It might just be an issue of what fields you are using to trigger the action to filter or highlight. I just made a quick example with an old dataset using the data densification method to render the bins... by setting a highlight action to trigger based on the hex lat and lon (not the table calc used to actually render the polygon on the map), I can successfully highlight with interaction on any of the vertices or the filled polygon. So, maybe just try changing what fields are used in your action to list the underlying data?
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