New UI batching problem

Hello, I have a very simple scene. Only 1 camera that only shows a color for the background, and all the other elements are UI elements, created from the same sprite atlas.
When I look at the stats window it shows 8 draw calls and 0 saved by batching. I tought that using only 1 atlas will help me lower the draw calls. I will mention that this is a very big atlas 4096 X 4096 that holds almost all of my graphics, mostly UI elements.

Am I doing something wrong?

If you use Masks, they will affect draw calls.
1 mask = 2 draw calls.

And Text fields, they won’t going to batching too.