I'm developing a Prestashop module, and I'm adding and removing products from the cart.
Whenever I try to get the shipping price, I get the value I had before the change...

Okay

Let me tell you another PS joke.
As soon as you enable the Advanced EU Compliance module with EU shipping tax, it just removes the shipping tax information from the database!

I'm so glad that it is open source. The folks at thirty bees have forked it into something that actually works.