My mutations works properly with Amplify but not with Apollo. Why?

Question

I'm using AWS AppSync with Apollo. So far, so good except that I just realised that all my mutations are not working properly :

In the devtool, I can see the returned data like this:

{
  "data": {
    "getProduct": {
      "productId": "xxxxxxxxxxxxxxxxxxx",
      "title": "my title",
      "slug": "my slug"
    }
  }
}

...but when I try to console.log these same data, I get null. It does that only with my mutations (queries works fine).

{
  "data": {
    "getProduct": null
  }
}

Here is what I'm doing:

addProduct(variables): Observable<Product> {
  return this.apollo.mutate({
    mutation: gql`
      mutation addProduct($product: AddProductInput) {
        addProduct(product: $product) {
          productId
          title
          slug
        }
      }
    `,
    variables
  }).pipe(
    tap(console.log)
  )
}

After few hours trying to find a solution, I tried to replace Apollo with AWS Amplify and It worked as expected.

The thing is that I don't want to use AWS Amplify. I can't use fragments/offline/optimistic UI/fetchPolicy... and I really need these.

So I'm wondering if that is supposed to be like this or am I missing something here?

Answer 1

With the help of Kamil Kisiela, we have find out that it worked again when adding disableOffline: true to AWSAppSyncClient. So I looked for bugs that looked like this and I found this. Then I upgraded aws-appsync to 1.3.3 and it worked all the time, even without disableOffline: true. Yay!