Refresh Metrics on Metadata values changing

.. in case things like Weight, CP or W' metadata was changed

src/RideItem.cpp

@@ -364,13 +364,15 @@ RideItem::checkStale()
         if (context->athlete->emptyindex == true) {
             metacrc = 0; // reset as index missing
             isstale = true;
-
-        // metadata has changed
-        } else if (metacrc != metaCRC()) isstale = true;
-
+        } 
     }
 #endif
 
+    // we need to mark stale for 2 reasons
+    // 1) lucene index needs updating
+    // 2) "special" fields may have changed (e.g. CP)
+    if (metacrc != metaCRC()) isstale = true;
+
     return isstale;
 }