Isolate Button Interactivity Only to Front of Image?

We are building an AR experience that has buttons on the front and back of a 3D image (static image). Our problem is that buttons on the rear of the panel activate when that location is tapped on the front of the 3D panel. Interactivity is done through Actions: On Tap.

How do we disable or block our Tap Actions on the reverse side of our buttons?

(We’ve used both pngs and planes)

Thanks for your help.