Cannot Load Texture for ShapeNet Meshes

I'm trying to load textured models of [ShapeNet](https://shapenet.org/) 3d objects with the following code:
```
tm = o3d.io.read_triangle_mesh("model.obj", True)
tm.compute_vertex_normals()
```
but when I draw the geometries the mesh is displayed textureless.
Inspecting the `textures` attribute of `triangle_mesh` I can see that the textures were correctly loaded inside the object but are not displayed in the viewer.

I've also tried loading the textures separately
```
import cv2
img1 = cv2.imread(self.data_root + os.sep + str(idx) + os.sep + "images/texture0.jpg")
img2 = cv2.imread(self.data_root + os.sep + str(idx) + os.sep + "images/texture1.jpg")
tm.textures = [o3d.geometry.Image(img1), o3d.geometry.Image(img2)]
```
but the results were the same.

I'm attaching an example of an object from ShapeNet (not working) and another object found on the internet (working).

Open3D version: 0.13.0 13aef96

[capsule.zip](https://github.com/isl-org/Open3D/files/7310133/not-shapenet.zip)

[shapenet.zip](https://github.com/isl-org/Open3D/files/7310131/shapenet.zip)