Material picking of Nanite meshes with multiple sections not working

Picking a material of a section of a Nanite enabled mesh will not work correctly, while the same picking logic works fine for non-Nanite meshes. On Nanite meshes, the reported section index seems to be off by one when inspecting the sections in the static mesh editor.

• Open the attached repro project and double-click NewMap
• In the Outliner, double-click SM_MultiColorBox_NoNanite1
• Aim the viewport camera at a section of the non-Nanite enabled mesh
• Select the BP_MaterialPicker in the outliner and press the GetMaterialInEditor button. This should work correctly.
• In the outliner, double-click SM_MultiColorBox_WithNanite, aim the camera at a section and click the GetMaterialInEditor button. In almost all cases, the wrong material name will be reported