Loading point clouds using different formats causes problems with visualization

### Checklist

- [X] I have searched for [similar issues](https://github.com/isl-org/Open3D/issues).
- [X] For Python issues, I have tested with the [latest development wheel](https://www.open3d.org/docs/latest/getting_started.html#development-version-pip).
- [X] I have checked the [release documentation](https://www.open3d.org/docs/release/) and the [latest documentation](https://www.open3d.org/docs/latest/) (for `main` branch).

### My Question

I have point cloud captured by a camera, whose SDK provides the possibility of exporting the point cloud as a .ply, or .pcd. When I save it as .ply, and load it into an open3d point cloud, I am able to visualize it. However, when I save and load it as a .pcd, I end up with an empty visualizer., although the point cloud information is all loaded.
I also compared the values loaded into each point cloud and they are equal.
Is there anything else that should be done?
I am using the Cpp API, and I searched for similar issues, but couldn't find any.
any pointers are appreciated.

Thank you !