[Smush Pro] Defer offscreen images on mobile [Lazyloading enabled]

I am getting defer offscreen images warning on mobile version (not desktop) in pagespeed test: https://developers.google.com/speed/pagespeed/insights/?url=https%3A%2F%2Fwww.bizonee.com%2F

Lazyloading is already enabled. I have provided a support access to WordPress board.