CanvasGroup alpha reacts differently in Game than it does in Scene

I'm working on a 2d game and I have a parent object with the CanvasGroup component on it. When I change the alpha value to 0 in the Scene view then it does what I would expect, make the object invisible. When I change it in the Game view, only certain children of the parent are affected. All the children are an 'Image' and I don't know why only some are affected. And even at that, the children aren't as transparent in the Game view as it was in the Scene view. Any idea why?

 

Any ideas?

 

No ideas?

 

@SaoSilver

"No ideas?"

Well this is 2D graphics specific forum, not many UI people reading this forum.