Half of mesh goes missing from MD to Blender

Hi. When you duplicate a front pattern in MD to use it as the back, flip its normal(RMB-click on it and choose Flip normals). You can see in MD that the back pattern is grey, that is its inner side. Since we export the garment as thin (one-sided), in Blender you’re seeing its non-existent inner side.
Anyway, to fix this in Blender, select a face on the back side, press Ctrl L, then Mesh - Normals - Flip normals.