We have tested your website on a mobile device and could not reproduce the issue you described. The slider works properly, all slides are visible, and the navigation functions as expected. Here is a video demonstrating this (https://monosnap.com/file/bYuMNazQqxzLXEUAsLpSlUG9Kf3V6S).
If you are still experiencing the issue, please provide more details. Record a video of the problem or describe the exact steps required to reproduce it.