diff --git a/OpenRA.Game/Graphics/TerrainRenderer.cs b/OpenRA.Game/Graphics/TerrainRenderer.cs
index 1f6a123159..a6011527b0 100644
--- a/OpenRA.Game/Graphics/TerrainRenderer.cs
+++ b/OpenRA.Game/Graphics/TerrainRenderer.cs
@@ -18,11 +18,13 @@ namespace OpenRA.Graphics
 		readonly TerrainSpriteLayer terrain;
 		readonly Theater theater;
 		readonly CellLayer<TerrainTile> mapTiles;
+		readonly CellLayer<byte> mapHeight;
 
 		public TerrainRenderer(World world, WorldRenderer wr)
 		{
 			theater = wr.Theater;
 			mapTiles = world.Map.MapTiles.Value;
+			mapHeight = world.Map.MapHeight.Value;
 
 			terrain = new TerrainSpriteLayer(world, wr, theater.Sheet, BlendMode.Alpha,
 				wr.Palette("terrain"), wr.World.Type != WorldType.Editor);
@@ -30,8 +32,8 @@ namespace OpenRA.Graphics
 			foreach (var cell in world.Map.AllCells)
 				UpdateCell(cell);
 
-			world.Map.MapTiles.Value.CellEntryChanged += UpdateCell;
-			world.Map.MapHeight.Value.CellEntryChanged += UpdateCell;
+			mapTiles.CellEntryChanged += UpdateCell;
+			mapHeight.CellEntryChanged += UpdateCell;
 		}
 
 		public void UpdateCell(CPos cell)
@@ -48,6 +50,8 @@ namespace OpenRA.Graphics
 
 		public void Dispose()
 		{
+			mapTiles.CellEntryChanged -= UpdateCell;
+			mapHeight.CellEntryChanged -= UpdateCell;
 			terrain.Dispose();
 		}
 	}
diff --git a/OpenRA.Mods.Common/Traits/World/EditorResourceLayer.cs b/OpenRA.Mods.Common/Traits/World/EditorResourceLayer.cs
index 3224e6b4aa..56fc6dd836 100644
--- a/OpenRA.Mods.Common/Traits/World/EditorResourceLayer.cs
+++ b/OpenRA.Mods.Common/Traits/World/EditorResourceLayer.cs
@@ -207,6 +207,8 @@ namespace OpenRA.Mods.Common.Traits
 			foreach (var kv in spriteLayers.Values)
 				kv.Dispose();
 
+			Map.MapResources.Value.CellEntryChanged -= UpdateCell;
+
 			disposed = true;
 		}
 	}
diff --git a/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs b/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs
index f11e9c9e95..570deb906d 100644
--- a/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs
+++ b/OpenRA.Mods.Common/Traits/World/ResourceLayer.cs
@@ -294,6 +294,8 @@ namespace OpenRA.Mods.Common.Traits
 			foreach (var kv in spriteLayers.Values)
 				kv.Dispose();
 
+			RenderContent.CellEntryChanged -= UpdateSpriteLayers;
+
 			disposed = true;
 		}
 
diff --git a/OpenRA.Mods.Common/Widgets/RadarWidget.cs b/OpenRA.Mods.Common/Widgets/RadarWidget.cs
index 99c1164f7a..4c194f6321 100644
--- a/OpenRA.Mods.Common/Widgets/RadarWidget.cs
+++ b/OpenRA.Mods.Common/Widgets/RadarWidget.cs
@@ -442,5 +442,12 @@ namespace OpenRA.Mods.Common.Widgets
 			var v = (int)((p.Y - mapRect.Y) / previewScale) + world.Map.Bounds.Top;
 			return new MPos(u, v).ToCPos(world.Map);
 		}
+
+		public override void Removed()
+		{
+			base.Removed();
+			world.Map.MapTiles.Value.CellEntryChanged -= UpdateTerrainCell;
+			world.Map.CustomTerrain.CellEntryChanged -= UpdateTerrainCell;
+		}
 	}
 }