Surface type only returns default in tiled world using world composition

We are doing the normal linetrace to get the physical material / surface type of the landscape that works fine on a standard landscape with a single tile. But in our world map that is using multiple tiles with world composition it only ever returns default.

We have debugged with World Origin Rebasing on and off, and still no luck… is there something we are missing.

Any help would be amazing.

This must of been a bug with 4.19 (Thanks for letting us know Epic) as this fixed itself when upgrading the engine version.