Incompatibility with assets using Physics.Raycast

Anyone know of compatibility issues between components that use Physics.Raycast and ARkit?

I am trying to use a very popular mobile touch package

(LeanTouch) https://www.assetstore.unity3d.com/en/#!/content/30111

that we successfully used in previous Vuforia based Ar projects.

However, I cannot seen to be able to get the Press -S elect working to select 3d objects in my scene.

I just ran into this conflicts with Lean Touch and Physics Raycaster. The only workaround I could come across was putting the gameObjects controlled by leanTouch into a layer that ignored rays.