RTX Translucency - Backface

Hello all,
I noticed when I active ray tracing translucency, both faces of a surface are visible.
Is that the expected behavior? I guess there is something wrong here…
link text

I got the same issue. It’s also related to what is described in this thread:

Because when you turn on translucency you see everything double sided, so you also see the inside of the default pawn when you press play.