Do I assume that cascading two queries is the basis of the issue of my
quick filters no longer working?

The quick filters worked fine previously; but quit working on my split
form after I cascaded two queries and made the 2nd query the source of
my form.

The first query has a logical IIf that is based off of a checkbox on the
form. I decided to create the 2nd query in order to keep the
functionality of the checkbox current.