Fixed #12632

core/src/mindustry/core/Logic.java

@@ -413,6 +413,7 @@ public class Logic implements ApplicationListener{
 
         //map is over, no more world processor objective stuff
         state.rules.disableWorldProcessors = true;
+        state.markers.clear(); //TODO: should this optional?
 
         Call.clearObjectives();
 

core/src/mindustry/game/MapMarkers.java

@@ -17,6 +17,13 @@ public class MapMarkers implements Iterable<ObjectiveMarker>{
     public Seq<ObjectiveMarker> mapMarkers = new Seq<>(false);
     public Seq<ObjectiveMarker> lightMarkers = new Seq<>(false);
 
+    public void clear(){
+        worldMarkers.clear();
+        mapMarkers.clear();
+        lightMarkers.clear();
+        map.clear();
+    }
+
     public void add(int id, ObjectiveMarker marker){
         if(marker == null) return;
         var prev = map.put(id, marker);