libgdx ScissorStack problem

Question

Im making a user interface using libgdx I created a Window class & a Textfield class, that both use clipping. I use the ScissorStack class of libgdx for clipping.

The Textfield is drawn inside the window class.

Window draw method :

ScissorStack.calculateScissors(camera, batch.getTransformMatrix(), clipBounds, scissors);
ScissorStack.pushScissors(scissors);

//Draw textflied

ScissorStack.popScissors();

Textfield draw method:

clipBounds.setPosition(
            700,
            200
            );

//Draw textfield image

ScissorStack.calculateScissors(camera, batch.getTransformMatrix(), clipBounds, scissors);
ScissorStack.pushScissors(scissors);

//Draw text

ScissorStack.popScissors();

The current problem is on the Textfield class with this code :

clipBounds.setPosition(
            700,
            200
            );

If I remove this code I don't get error.

This is the error :

Exception in thread "LWJGL Application" java.lang.IllegalStateException: Array is empty.
at com.badlogic.gdx.utils.Array.pop(Array.java:292)
at com.badlogic.gdx.scenes.scene2d.utils.ScissorStack.popScissors(ScissorStack.java:77)

I noticed that if I change the value of clipBounds, something I got the error, and sometimes, with some values, I dont get the error.