GLTFLoader: assign unique names to children of cloned refs in _getNod…

…eRef() (fixes mrdoob#30090)

examples/jsm/loaders/GLTFLoader.js

@@ -2796,7 +2796,15 @@ class GLTFParser {
 
 		updateMappings( object, ref );
 
-		ref.name += '_instance_' + ( cache.uses[ index ] ++ );
+		const instanceSuffix = '_instance_' + ( cache.uses[ index ] ++ );
+
+		ref.name += instanceSuffix;
+
+		for ( const child of ref.children ) {
+
+			child.name += instanceSuffix;
+
+		}
 
 		return ref;