Added check for WebXR blurred state so we don't show frozen controller while showing system UI

src/renderers/webxr/WebXRController.js

@@ -133,7 +133,7 @@ Object.assign( WebXRController.prototype, {
 		const grip = this._grip;
 		const hand = this._hand;
 
-		if ( inputSource ) {
+		if ( inputSource && frame.session.visibilityState !== 'visible-blurred' ) {
 
 			if ( hand && inputSource.hand ) {