diff --git a/Pathfinding/RegionManager.cs b/Pathfinding/RegionManager.cs
index f2745ea..7e72bf4 100644
--- a/Pathfinding/RegionManager.cs
+++ b/Pathfinding/RegionManager.cs
@@ -29,6 +29,8 @@ namespace Pathfinding
             
             Region? loadedRegion = RegionFromId(id);
 
+            if(_regions.TryGetValue(id, out Region? retRegion2)) //Prevent other thread from changing collection
+                return retRegion2;
             if(loadedRegion is not null)
                 _regions.TryAdd(loadedRegion.regionHash, loadedRegion);