I use a Slick crousel as the header on the front page of one of my sites. I noticed that although it looked good on a computer, the phone presentation was not very good. Instead of a carousel, I was getting "vertical strips", where instead of the photos being rendered properly, a strip from the left side of each photo was being shown.
I found that the problem was that I had checked "Vanilla Slick". Unchecking "Vanila Slick", then setting the Main Stage to be the field name of the photos that I want to show, and leaving everything else set to "None" fixed the problem.