The same thing was happening with the theme I’m using.
I solved this by slightly changing the file “mgwoocommercebrands-widget-brands-list.php”.
Around line 74 (+/-), you need to:
a) open the ‘div’ before the ‘if has title’
b) attribute a class to the title.
for my theme, it worked as this:
echo '<div class="widget woocommerce widget_mgwoocommercebrands">';
if ( $instance['title'] ) {
echo "<h3 class=\"widget-title m-secondary-font\">{$instance['title']}</h3>";
}?>
<?php
