Touch Controllers issue

Hi, 
Im trying to add UI System to both touch controllers (was able to do for one following this link:https://developer.oculus.com/blog/unitys-ui-system-in-vr/). Im using CustomHandRight/Left.
My gameplay needs only 1 controller so as i was not able to add UI system to both controllers I am only using CustomHandRight but if I hit a button on left controller my Right hand is blinking for a moment and OVRInputs are also performed from the Left controller (ex: Im using OVRInput.GetDown(OVRInput.Button.One) left controller is also triggering this event even when I dont have a left controller prefab in my scene). Please help.
Thanks