Why such glitch with jquery plugin for creating slick sliders?

Question

JavaScript

I put a slider. After the end of the cycle, pictures should be displayed starting from the first. And a glitch comes out. Then the correct display starts again?
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Answer 1

Remove the slick-prev and slick-next buttons , the plugin will add them itself

<div class="row slider-box">
 -<button type="button" class="slick-prev">Previous</button>
  <div class="col-lg-4 col-md-4 col-sm-6 col-xs-12"><img src="img/pic-2.jpg" alt=""></div>
  <div class="col-lg-4 col-md-4 col-sm-6 col-xs-12"><img src="img/pic-2.jpg" alt=""></div>
  <div class="col-lg-4 col-md-4 col-sm-6 col-xs-12"><img src="img/pic-2.jpg" alt=""></div>
  <div class="col-lg-4 col-md-4 col-sm-6 col-xs-12"><img src="img/pic-2.jpg" alt=""></div>
  <div class="col-lg-4 col-md-4 col-sm-6 col-xs-12"><img src="img/pic-2.jpg" alt=""></div>
  <div class="col-lg-4 col-md-4 col-sm-6 col-xs-12"><img src="img/pic-2.jpg" alt=""></div>
 -<button type="button" class="slick-next">Next</button>
</div>

Answer 2

try to add 1 more image
+ try to see the function you declared for slick