Hello, @lucam997,
You have to edit the particular product category and remove the description from the description box and it will solve your issue: https://postimg.cc/RJn8jWPS
OR you can try with this Custom CSS, you can paste the Custom CSS code under XStore >> Theme Settings >> Theme Custom CSS >> Global CSS:
.category-description, .page-description, .term-description {
display: none !important;
}
Regards 8Themes Team.