Selection.GetFiltered not working for Specific File Format

My task is to export certain files as asset bundle. There are different types of files in my directory.

I get these selected files using Selection.GetFiltered. File types includes: prefabs, materials and post processing profiles.

But I am getting nothing if I select Post Processing Profiles specifically.

I am doing this:

 Object[] selectedObjects = Selection.GetFiltered(typeof(Object), SelectionMode.DeepAssets);

Every time selectedObjects.Length is 0.

I remember it worked before, and now it is not working. Though, for materials and prefabs it's working fine.

Any idea what I am doing wrong?

Instead of typeof(Object) I have tried object, PostProcessingProfile, PostProcessingBehaviour etc. but to no avail.

I have also tried SelectionMode.Assets, and all others.

These files are .asset which is being used to set in Profile property of PostProcessingBehaviour class attached on Camera.

Any help!