Brand image not displayed in single variant listnings in loop

There is no product image displayed in the product loop when using Cross-Sells and Upsells and it is linking to a single variant of a variable product.

You should probably check if the product is a variant before displaying, then you can select the parent products brand if it is a single variant of a variable product.

Suggested fix:

addons/show_brands/show_brands_include.php line 308

Change:
$post_id = get_the_ID();

To:

if(get_post_parent()) {
     $post_id = get_post_parent();
 } else {
     $post_id = get_the_ID();
}