SAP DESIGN STUDIO 1.6: standard event calls custom component events twice

Hi Gurus, I created an app:

I have POPUP_1.SHOW() in BUTTON_1 On Click.

So, when I click on button, I noticed that Design Studio calls TABLE2D_1 Events twice. After some checks I can say that it happens with every custom components.

Is there any way to avoid this?

Thank you

Patrizia