Raycasting in VR Mode

Hi,
I’m having a trouble when I make a test for Raycasting in VR mode.
I created some objects in Blender
The yellow cube is at the origin (0,0). The position of controller is used as a origin of raycaster. Raycaster’s direction is set by a constant vector3 (0,-1,0). (I want to ray to the plane). .
To check the result, I printed the controller’s position and the intersection to console.
As you can see in the picture, the intersection object is got only if Y coordinate is positive. If the Y coordinate is negative, the result will be empty.
Is there any problem in my code?

Best regards.