I also have the same problem.
<?php biagiotti_mikado_get_module_template_part( 'widgets/woocommerce-dropdown-cart/templates/parts/opener', 'woocommerce' ); ?>
<div class="mkdf-sc-dropdown">
<div class="mkdf-sc-dropdown-inner">
<?php if ( sv_wc_is_category_alone_in_cart( $category ) && ! WC()->cart->is_empty() ) { // <= <=
biagiotti_mikado_get_module_template_part( 'widgets/woocommerce-dropdown-cart/templates/parts/loop', 'woocommerce' );
biagiotti_mikado_get_module_template_part( 'widgets/woocommerce-dropdown-cart/templates/parts/order-details', 'woocommerce' );
biagiotti_mikado_get_module_template_part( 'widgets/woocommerce-dropdown-cart/templates/parts/button', 'woocommerce' );
} else {
biagiotti_mikado_get_module_template_part( 'widgets/woocommerce-dropdown-cart/templates/posts-not-found', 'woocommerce' );
} ?>
</div>
</div>
The affected line is
<?php if ( sv_wc_is_category_alone_in_cart( $category ) && ! WC()->cart->is_empty() ) { // <= <=