VTEX Wishlist addItem action is not returning the updated wishlist accordingly in some cases

## Issue Type

Please inform the type(s) of issue(s) you are reporting:

- Bug Report

## Description

Please provide a clear and concise description of the issue or enhancement.
Include any relevant information that could help reproduce the issue or
understand the request.

## Expected Behavior

After calling the addItem action, it should return the updated wishlist with the user's products.

## Actual Behavior

It was returning an empty array in some cases.

## Additional Context

I found it weird that the action was calling the wishlist loader directly via importing the function instead of `ctx.invoke`

---

Thank you for taking the time to report this issue!