WebXRManager: Update camera's local matrix and transform properties.

src/renderers/webxr/WebXRManager.js

@@ -413,6 +413,8 @@ function WebXRManager( renderer, gl ) {
 		// update camera and its children
 
 		camera.matrixWorld.copy( cameraVR.matrixWorld );
+		camera.matrix.copy( cameraVR.matrix );
+		camera.matrix.decompose( camera.position, camera.quaternion, camera.scale );
 
 		var children = camera.children;