The description of the bug report says that the crash only happens on meshes with multiple material IDs but I am getting crashes on my meshes with single materials as well. My FBX files are binary and exported from Blender. In my normal Blender workflow, I do not assign a material to my meshes in Blender if they are only going to have a single material in UE4. This has always worked in the past, however, now I also get this crash when importing any FBX that wasn’t assigned a material in Blender before hand.