landing page imagery too large

Site URL: https://www.candacechestnut.com

Trying to figure out why my hover images are appearing so large on the landing page. Reduced the size of the originals and replaced but to no avail. They appear fine on the mobile view but are huge and cut off on the desktop. Also affecting the social images..:(

Try adding this to Design > Custom CSS

.portfolio-hover-bg-img img {
    object-fit: contain !important;
}