Disorted slider on mobile / tablet

If your slider's background image is disorder on mobile, you are probably using the Minimum height (Size → under Responsive: Slider height → Min) and the Stretch fill mode (Slide settings → Background → Fill mode) for your slider background, and these options don't work very well with each other.

You should either turn off the Minimum height by setting it to 0, or modify the Fill mode to something else, for example, fill, which will look much better with the Minimum height.