frontend/src/pages/MapPage.tsx

@@ -151,7 +151,7 @@ export function MapPage(): React.JSX.Element {
 
   useEffect(() => {
     setPage(1);
-  }, [range, originFilter, selectedCountry, bans, pageSize]);
+  }, [range, originFilter, selectedCountry, pageSize]);
 
   /** Bans visible in the companion table (filtered by selected country). */
   const visibleBans = useMemo(() => {
@@ -164,6 +164,14 @@ export function MapPage(): React.JSX.Element {
     : null;
 
   const totalPages = Math.max(1, Math.ceil(visibleBans.length / pageSize));
+
+  // Clamp page to totalPages when data shrinks below current page offset
+  useEffect(() => {
+    if (page > totalPages) {
+      setPage(totalPages);
+    }
+  }, [totalPages, page]);
+
   const hasPrev = page > 1;
   const hasNext = page < totalPages;