Slides having Popper hides behind the next slide

[sunilrathore24]

I have used ngx-popper to display a dropdown of links inside a slide. When I open the dropdown and it expands onto the next slide, a portion of the dropdown is hidden behind the next slide.

https://stackblitz.com/edit/swiper-angular-example-nvddeg?file=src%2Fapp%2Fapp.component.html,src%2Fapp%2Fapp.component.scss,src%2Fapp%2Fapp.component.ts,src%2Fapp%2Ffocus-slide.directive.ts,src%2Fapp%2Fapp.module.ts

has any one faced such an issue?
Suggestions are welcome.