Subtotal is not updating

Hey,

On my test website, the subtotal in the header is not updated as I switch currency.
Same problem on the “off side” cart that shows up from the right of the screen when I add something in the cart.
The currency name is updated, but the amount stays in the previous currency.

The problem is solved if I go to the checkout page. There, everything goes back to normal.

Can you help me on that ?

Thanks a lot !