Hi,
I don't know if you will call that a bug, but from my point of view, it is.
in cart view during checkout process, according to tax rule, you display the total of TAX, above the total price.
as in my case i did a test with a user who lives in Slovakia i have "Slovakia" (as tax title) and the amount of all taxes so 2€ (as tax is 20% of 10€ product price)
i guess it should be written TAX as text and not the tax title it self, because in case you have a tax title like "France - Reduced Taxe (5.5%)" ...it is not nice to see on cart review, even if it's correct from law point of view.
see screenshot here bellow.