Why does my dropdown menu show a white blank on product pages?

[minh007]

On my site dropdown menu, the menu item display white blank as the image below when Im on that page. This issue only happen with product page. Other page is ok. Is anyone know about this issue? Thank you!

[Shop_Lovers]

Share your store URL

[minh007]

This is my store: https://hcookware.com/ pass: tiezay

[Shop_Lovers]

Use Below CSS

li.main-menu-list-item.active {
    background: none !important;
}

Hit Like and Accept as Solution

[minh007]

Where should I put it?

[Shop_Lovers]

You can put this in styles.css file in the end

[minh007]

Thank you very much! It solved