Why can't I "Show Relevant Values Only"?

Hey @neelay! Thanks for your info. I’m wondering if it is something with the dataset. Maybe you can help me… I have made filters that function across visuals built on multiple datasets before. These filter controls are tied to a parameter and a specific field in the dataset. Because the same field is found in the multiple datasets represented in the dashboard, the filters have worked. At least I think this is why it has worked.

In this instance I have a filter (Filter 1) that is applied to a visual built on dataset A. Filter 1 is tied to field A that exists in dataset A. Field A is not represented in the other datasets. However, my issue is that I want a second filter (Filter 2) to control what values appear in Filter 1. Filter 2 is based on a field B that exists in every dataset included in the dashboard.

Thoughts? Thanks for your help!