Why Break Hit Result hasn't FaceIndex?

I would need the face index of the hit result by ray casting with Single Line with Objects, but Break Hit Result doesnt contain this property. Though I coded a simple blueprint function to get the faceindex, it always returns with -1. Maybe it isn’t set for ray casting at all?

well from source I think probably the blueprint uses a default query parameter variable with bReturnFaceIndex = false, but please anyone confirm this… I think it means querying face index is only possible atm from C++ code.

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I`ve some trouble