Question Problem with Camera.main.WorldToScreenPoint(transform.position)

Hi everyone! Maybe this problem is not for this forum, but I posted it in another but no one has responded and I've been stuck with this for several days
I am having a problem that I don't know why it happens and I don't know how to solve it.

I have a UI.Image in the scene inside a Canvas (it is the only Canvas in the scene). This UI.Image takes the position of an object in the 3d world, using "Camera.main.WorldToScreenPoint (transform.position);" so that the UI.Image is always seen in the position of the 3d Object in the world.

The problem is that when my back is to the 3d object and I zoom out the UI.Image is displayed in front of me. I leave video so you can see what I mean.

How can I solve this? Why is this happening? What is the correct way to do this without having to make a Canvas.RenderMode-> WorldSpace as a child of the 3d Object?

Greetings