Added material does not show the green dot indicating that material is in the project

When user adds a material to the project from Content Library, the material on the Materials -tab has a green dot indicating, that it is added to the project.

But if user adds the same material to "User Assets", it does not show the green dot anymore, even when the same project is still open with the added material.

qtdesignstudio_jQjk8SNBjK.mp4