Finsweet CMS Slider - images distorted

Hello everyone !

It’s my first project on Webflow and I got an issue with my Finsweet CMS Slider.

Below 480px width on mobile, my images look distorted as if they were in <fit: fill> while they are well in cover.

I haven’t found a solution yet.

I tried to put my images in the background of a div. The images look OK. But their loading can’t be set to eager. It makes a blink as soon as I arrive on the page which doesn’t look very professional.

Have you ever had this problem?

Thanks for your precious help !

Here is my site Read-Only: Webflow - Tand'M Architectes
(how to share your site Read-Only link)