ARKit-camera.project_ray_normal return wrong value

[waci11]

Stretch Mode = Viewport
Stretch Aspect = Expand
the result is offset to the center of the screen
For example:
The size of the viewport is 1440x1920 .
When I click on (1380, 1855). Objects at (1075,1410) is hit by the ray .
When I click on (1075,1410), Objects at (905,1150) is hit by the ray .

By the way , the 3d object that is the child of the camera is not pinned to the camera ，the 3d object will offset the position when camera move .

And the control node can not be "Full Rect"
For example:
If the screen size is 100x100 and the viewport size is 50x50, the ui will only be displayed within the quarter of the screen which is at the upper left corner . can not press the ui button because the click of control node is offset too .

At last , I am not sure if this is a bug , but it took me a lot of time to make the camera move .
I need to set ARVROrigin.world_scale to 100 to match the camera position with IOS device(The device moves 1 meter, the camera moves 100 units)