Updating cart attributes inside useBuyerJourneyIntercept doesn't work

[JH12]

Hello everyone!

I'd like to update cart attributes when user clicks the "complete order" button.
So I call the useApplyAttributeChange func (https://shopify.dev/docs/api/checkout-ui-extensions/2023-07/react-hooks/attributes/useapplyattribute...) inside the useBuyerJourneyIntercept.
I think it processes the payment and redirect to the thank you page after receiving the result from the updateAttribute, but it doesn't work out as I expected and still remains in the payment page. 
I want to know the reason. Could anyone explain it to me please?

const updateAttribute = useApplyAttributeChange();
const isRunning = useRef<boolean>(false);

useBuyerJourneyIntercept(async ({ canBlockProgress }) => {
    if (isRunning.current && canBlockProgress) {
       return {
         behavior: "block",
         reason: "Enter your password",
       };
     }
 
     isRunning.current = true;
     
     const result = await updateAttribute({
       type: "updateAttribute",
       key: "key",
       value: "value",
     });
 
     isRunning.current = false;
 
      
     return {
       behavior: "allow",
     };
   });