Using Tracker fields on a Dashboard connection to a BAQ with a Union

I’ve created a BAQ that uses a union to combine two data sets. I originally coded this BAQ using Parameters in the BAQ itself. While troubleshooting an issue, Epicor Support suggested that instead of deploying the BAQ via a Dashboard with the parameters, that instead I deploy it as a tracker using tracker fields. This worked great until I realized that the tracker fields only seem to filter results from the first query in the union, and there does not appear to be a way to filter the results on the second query in the union. Figured I would ask here to see if anyone has any experience with this.
Thanks!

Hi, were you able to resolve this?

Unfortunately no.