When spatially filtering the map in an ArcGIS Dashboards app using the category selector, the spatial filter displays the input features instead of filtering and displaying what is inside the polygon.
When a category selector uses categories from grouped values and spatially filters features, the bounding envelopment of the group of features is used for the selection. This can result in features appearing outside of the selected polygon shapes. For precise spatial filtering, using a category selector with categories from features is recommended.