That because in new version of Visual Composer, they change HTML structure a bit. Please add this css code into the “style.css” file:
.main-container .banner-static4 .box:hover .vc_icon_element.icon .vc_icon_element-inner .vc_icon_element-icon::before {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
Best regards