How to fix vertical slick slider not working properly?

Question

JavaScript

Here is the vertical slider
Questions:
1. Why does it work incorrectly after the 4th scroll? I found a similar topic , but no solution.
2. What solutions do you use?

Answer 1

the error was that the pictures were endless in the slider and the width was 18000px, and if you find this number and remove it, it reappears there, but already 2 * ... e.

SOLUTION : in css write the following for the big slider, in my case:

.big-slider {
  width 512px;
  max-width: 100%;
}