diff --git a/ui/src/pages/Pivot.jsx b/ui/src/pages/Pivot.jsx
index 7d2c98f..f10b2be 100644
--- a/ui/src/pages/Pivot.jsx
+++ b/ui/src/pages/Pivot.jsx
@@ -150,6 +150,12 @@ export default function Pivot({ source }) {
           if (!row) return
           const eventFilters = (detail.config || {}).filter || []
           const config = await viewer.save()
+
+          // Without a group_by hierarchy there are no coordinate filters, so the
+          // query would return the entire dataset — skip the inspector in that case
+          const hasHierarchy = (config.group_by || []).length > 0
+          if (!hasHierarchy) return
+
           setClickDetail({ row, config, column_names, eventFilters })
 
           // Use a Perspective view with the event filters + expressions so computed