Swiper with swiper slides inside sidepanel

I am trying to put a swiper with 5 slides of images inside a side panel but it does not work.
It is possible to move the slides from left to right, etc. but it does not “flow”.
And when i also change to “fade” as effect, then nothing works.

I think that this has to do something with the initialization either of the panel or the swiper, but i am not wure. where my error is.

Has anyone tried out to put an image swiper inside one of the side panels?
Greetings and thanks for your time and support guys!

[UPDATE]
If i put the swiper inside a card of my side panel, than it works. It looks like the swiper does not get the responsiveness when it is inside a simple LI list tag - could that be?

Could be issue of LI styling causing wrong swiper sizes