Add following code in Custom JS field on Settings page:


window.addEventListener( "Sellify::UCD::Initialized", function(){
    var bold_cart_doctor = function( cart ){
        if( typeof BOLD === "object" && typeof BOLD.common === "object" && typeof BOLD.common.cartDoctor === "object" && typeof BOLD.common.cartDoctor.fix === "function" )
        {
            return BOLD.common.cartDoctor.fix( cart )
        }
        
        return cart;
    }

    sellify.ucd.filters.cart.push( bold_cart_doctor )
} )