Our plugin have to rebuild cart contents to get correct prices .
But some themes/plugin try to show mini-cart when new item was added to the cart.
You should use this PHP code to fix the problem
add_filter( 'wdp_exclude_hooks_when_add_to_cart_calculated_items', function ( $hooks ) { $hooks[] = 'woocommerce_add_to_cart'; return $hooks; } );