mmm kinda weird.
Just tested in different new empty scene everything working like a charm.
Can't make it work in a scene i can't share for NDA reason.
I guess this is some kind of false positive and more related to houdini and this particular scene.
I've reloaded the same geo cache and rops into a new houdini scene and everything is ok.
My conclusion : everything is fine between Wedge node and octane rop.
Thanks you for your dedication.