configure different price by quantity

[desperados]

contao 2.11.2 + isotope 1.3.0 or 1.3.1
I create a product, and insert 3 advanced prices:
1) minimum quantity 1 = 10 euros
2) minimum quantity 10 = 9 euros
3) minimum quantity 20 = 8 euros
but when I add products to cart, whatever is the numbers, the price is always 10

I tried to set tax to null or to default (iva 21%), to set shop to null or to default (the "test" shop), to set members to null or to the only one member present ("customer"), but nothing changes

[desperados]

I attach 2 images: backend configuration and frontend cart

[tsarma]

I have a contao 2.11.1 + isotope 1.3.0 and also in same stage as you, namely setting up 'Advanced pricing'.
For me this has a problems like
- adding new price in the BE don't work properly as expected. It shows only after reloaded manually.

Another similar things is
- I've multiple prices according to Member Groups (A, B and C) and non members. Un till I choose the "Store configuration" same for all the prices it didn't worked. Default Store seems to have no effect here. So did you Choose same "Store configuration" for all prices?

[desperados]

I tried to set ot not the "Store Configuration" option, but nothing changes, the result is the same