I encounter the same problem with my dashboards. I try to educate users that anytime something like that happens or the view doesn't look right they need to re check the filters. In this case the filter would show (D) indicating the field is not an available option.
Not idea, but so far it's working.
Thanks for your response. This seems to be a fairly common issue.
In the meantime I used the work around explained in this article Oh no! My filter made my stuff disappear! | Tableau Public
Now it at-least looks neat with a popup sorta msg popping when there is a blank screen, requesting the user to select the appropriate value from the second filter. It did the job for now but I ll keep trying for a solution for our original problem and will update this page if I find any. Fingers crossed!.