__typename is missing after upgrading from @urql/core 3.0.5 to 3.1.0

[mech]

Describe the bug

After upgrading, I noticed all my __typename are gone. Do I need to explicitly specify them in my query?

This work on 3.0.5 without specifying __typename in the selection:

query {
  notes {
    id
    name
  }
}

From the default test codesandbox you can see the __typename is missing.

Reproduction

https://codesandbox.io/s/friendly-engelbart-sb00j4?file=/package.json

Urql version

urql = 3.0.3
@urql/core = 3.1.0

Validations

• I can confirm that this is a bug report, and not a feature request, RFC, question, or discussion, for which GitHub Discussions should be used
• Read the docs.
• Follow our Code of Conduct

[mech]

[JoviDeCroock]

Fixed by #2871