new pull for xhrloader mentioned in #9093 (#9261)

src/loaders/XHRLoader.js

@@ -20,15 +20,18 @@ Object.assign( THREE.XHRLoader.prototype, {
 
 		if ( cached !== undefined ) {
 
-			if ( onLoad ) {
+			scope.manager.itemStart( url );
 
-				setTimeout( function () {
+			setTimeout( function () {
+
+				if ( onLoad ) {
 
 					onLoad( cached );
+				}
 
-				}, 0 );
+				scope.manager.itemEnd( url );
 
-			}
+			}, 0 );
 
 			return cached;