Marketpress isn't applying taxes on digital download products

When we activate the "Apply Tax to Digital Products?" option in "Store Settings -> General", as well as "Enter Prices Inclusive of Tax?" and "Display tax label?", and we apply a tax in a digital download product, then the price isn't showing excluding tax.
For example, I set price for a digital product as 100$ and I also set a tax of 20%.
In the product list page, single product page and cart page, we can see $100.00 (tax excl.) instead of something like $83.33 (tax excl.) for the specific product.

Setting the "Charge Taxes (Special Rate)" option in the single edit product screen is giving the same results.