Why doesn't the slick slider preview work correctly?

Question

Slick

Hello! In general, the problem is this. When minimizing the browser window or in "autoplay: true," mode, the preview is not saved in the specified amount. Of the 3 installed, 2 remain on the screen, then 1. But if you set 5 thumbnails with "slidesToShow: 3," then everything works correctly. Thanks in advance!
Link to JSFiddle