Hello, @gray_b,
Alright, Simply navigate to the Dashboard >> XSTORE >> Theme Options >> Theme Custom CSS >> Global CSS and then paste the below code at the bottom of the CSS box like this: https://postimg.cc/sMSJcfFq
article.blog-post .wp-picture.blog-hover-zoom:hover:before{background:transparent !important;}
Then save settings and check back to your site after clearing the browser cache.
Regards 8Themes Team.