BAQ Combo Box in Application Studio

I am converting some of my classic customizations to Kinetic.
In a few places, I used BAQ combo boxes where the associated BAQ used table or subquery criteria like this:

The classic combo box did not require any further parameters, it just passed the filter value.

In Kinetic, I am not getting the same result. Using the BAQ with the [EpiBinding.JobHead.PartNum] does not return any values. I have figured out how to accomplish the same function by removing the criteria from the BAQ and adding filters and filter params to the combo box properties (see below), but I want to make sure I’m not missing something simple before having to rewrite this all.
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