Hi all,
I'm replying here as this might be useful to someone else, as it was for me (used as a temporary fix on my website). I've just found a block of CSS code that completely stops the hover animation on the website's Shop page. This resolves the issue of the second/third images not showing on mobile.
It's a "temporary fix," though, as it will completely eliminate the animation on that page and only display a fixed first image in the store page. It helps until Squarespace comes out with a final solution.
I found the solution in a post by Sam Crawford. There's also a video on his YouTube channel.
Hope it helps!
Cheers,
Luiz