Unity UI not showing some Images

Hi guys,

I am making UI for my game and my problem is that I can not manage to make UI Images visible anymore.

Everything worked fine until few hours ago. I have 6 level deep hierarchy on Canvas. I am making UI like this:

I create .png-s from .psd layers from Photoshop. I make GOs in world space, then I make that object son of Main Window, rescale so it fits fine, replace Transform with RectTransform, add UI/Image component, and set proper sprite. Image is not visible nether on Scene nor Game view.

I made half of UI this way and I stuck now.

My hierarchy look Like this:

 Canvas
   MainWindow
     Mask  (with ScrollRect)
       FatherGO (I group Panels with this)        
         PanelImage (Scrollable)
           GO (father of sprites)
             Button (with which I have problem)
             ...
             ...
             (i have 4 of them, everyone acting same)
         PanelImage (Scrollable - Did exactly the same in this hierarchy with no problems)
           ...
             (visible Images)

• Z axis val is 0 on all objects in hierarchy.

• Canvas render mode is Screen Space - Camera.

• I have CanvasRenderer on GO that is making problems.

• I tried with both Image and Raw Image with no results.

When I that problematic GO Image is Visible. It seems like Mask is hiding image but i do not know how come because I am not referencing to any RectTransform, I control that in script.

Also when I start Unity is throws me 3 same errors: aabb.IsValid()

I do not have that function, and when I double click on it in console it does not highlight it in MonoBehaviour.

Strange as hell!

I hope someone know what is going on.

Cheers!

UPDATE:

When I resize Mask to be bigger I see the Image. It seems it does inverse mask to that GO.

Also, when I move Image up to hierarchy (to be direct child of GameObject Mask) the Image is visible.

It is a kind of solution but It would be much more easier to use gameObject.SetActive(bool TorF) to one GO that is father of all that I want to show/hide at the moment then to loop trough children, check names and use gameObject.SetActive(bool TorF).

It is very unusual behaviour considering I manage to make Images visible on other GO. same deep in hierarchy.

Hope this will help someone figure out why is this happening.

Thanks.