fix add marker

index.js

@@ -442,7 +442,7 @@ function getMarkers(circlesAndMarkers, polygonAndMarkers, lineAndMarkers) {
         markers = [...circlesAndMarkers.markers]
     }
     if (polygonAndMarkers) {
-        markers = [...polygonAndMarkers.markers]
+        markers = [...markers, ...polygonAndMarkers.markers]
     }
     if (lineAndMarkers) {
         markers = [...markers, ...lineAndMarkers.markers]