Hi Rose,
the progress bar of free shipping does not update correctly in the product page – in the pop up style cart.
I mean, to replicate the issue please add a product to the cart, then the pop up with the progress bar appears saying “spend another XXX to have free shipping”. If you change the product quantity in the pop up, the progress bar does not update / does not reflect any change.
If you go to the “full/real” cart page, the progress bar updates correctly there, while changing the product quantity.