Ionic 4 tab cutting on parent element

Hi, I am trying to move the ion-tab-button a bit up putting position absolute, top -30px and overflow visible but none of this works. I tried already putting contain none on ion-tabs (a solution for a user here in stack overflow) and didnt work either. PS1. Even if I try to create a new Ionic 4 project an implement this doesnt work. PS2. I had success on Ionic 3 Can anyone help me please?
bug

Maybe set the z-order?