Hi there, I am currently in the process of making a cooldown system, though I having some issues with the draw orders (I think).
I have a button, which uses a background from an Atlas using UISprite. When the button is clicked, a cooldown texture appears on top of this background using the UITexture (I can't atlas this texture, because I have to use different materials using Alpha cutoff).
All this is working fine, until I run the game in "Maximized on play". Then the UITexture won't draw at all, though I can see it in the editor, but not on the game window.

Top image being the editor window
Bottom image being the game window
I find this very confusing, and I hope you can help.
Here is the order (don't know if this have anything to do with it)

Skillbutton1 being the button
Background being the UISprite using an Atlas
Cooldown being the UITexture using a shader