ai fixes

lib/screens/map_screen.dart

@@ -172,10 +172,13 @@ class _MapScreenState extends State<MapScreen> {
         // Compute guessed locations with caching
         final maxRangeKm = _estimateLoRaRangeKm(connector);
         final filteredKeys = filteredByKeyPrefix
-            .map((c) => c.publicKeyHex)
+            .map((c) => '${c.publicKeyHex}:${c.path.join("-")}')
             .join(',');
         final anchorKeys = allContactsWithLocation
-            .map((c) => c.publicKeyHex)
+            .map(
+              (c) =>
+                  '${c.publicKeyHex}:${c.latitude}:${c.longitude}:${c.path.isNotEmpty ? c.path.last : ""}',
+            )
             .join(',');
         final cacheKey =
             '$filteredKeys|$anchorKeys|${pathHistory.version}:${connector.currentSf}:${connector.currentBwHz}:${connector.currentTxPower}:${settings.mapShowGuessedLocations}';

lib/screens/path_trace_map.dart

@@ -289,7 +289,11 @@ class _PathTraceMapScreenState extends State<PathTraceMapScreen> {
             targetPos = LatLng(target.latitude!, target.longitude!);
           } else if (pathData.isNotEmpty) {
             // Infer from the last hop: average GPS contacts sharing that hop.
-            final lastHop = pathData.last;
+            // For a round-trip path (flipPathRound), the target-side hop sits
+            // in the middle of the symmetric sequence; .last is the local side.
+            final lastHop = (widget.flipPathRound && pathData.length > 1)
+                ? pathData[(pathData.length - 1) ~/ 2]
+                : pathData.last;
             final peers = connector.contacts
                 .where(
                   (c) =>