Update the MapCache with the correct UID.

OpenRA.Mods.Common/Widgets/Logic/Editor/SaveMapLogic.cs

@@ -130,8 +130,15 @@ namespace OpenRA.Mods.Common.Widgets.Logic
 				map.RequiresMod = Game.ModData.Manifest.Mod.Id;
 
 				var combinedPath = Platform.ResolvePath(Path.Combine(directoryDropdown.Text, filename.Text + fileTypes[typeDropdown.Text]));
+
+				// Invalidate the old map metadata
+				Game.ModData.MapCache[map.Uid].Invalidate();
+
 				map.Save(combinedPath);
 
+				// Reload map to calculate new UID
+				map = new Map(combinedPath);
+
 				// Update the map cache so it can be loaded without restarting the game
 				var classification = mapDirectories[directoryDropdown.Text];
 				Game.ModData.MapCache[map.Uid].UpdateFromMap(map, classification);