Yep sure

Query 1 (screenshot of which for some reason at the bottom of the reply, whereas other images have inserted in-line) is a simple query which I built a bar chart from and added bar chart to a dashboard.

If I then add a filter the dialog (correctly) displays the two available fields from the query I then add a further field to the query, save it, run it etc.

I then go back to the dashboard, refresh and attempt to add the filter again, same two fields are available to base a filter on, but not the newly added fy field