I can't seem to debug my custom OrderLineCalculator. I know the code runs, as I can log things to the Umbraco Log, but the debugger in Visual Studio doesn't hit at all.

This issue is also mentioned in this thread: https://our.umbraco.org/projects/website-utilities/tea-commerce/tea-commerce-support/83601-why-arent-the-customorderlinecalculator-run-on-http-thread

This site is running TeaCommerce 3.2.1 and Umbraco 7.5.13.

This is the code for the OrderLineCalculator:

[SuppressDependency("TeaCommerce.Api.PriceCalculators.IOrderLineCalculator", "TeaCommerce.Api")]
public class CustomOrderLineCalculator : OrderLineCalculator
{

    public CustomOrderLineCalculator(IVatGroupService vatGroupService, IProductInformationExtractor productInformationExtractor)
      : base(vatGroupService, productInformationExtractor)
    {
    }

    public override Price CalculatePrice(OrderLine orderLine, Currency currency, Order order)
    {
        //Code removed

        return base.CalculatePrice(orderLine, currency, order);
    }

}