Warning: Cannot update a component (Title) while rendering a different component (FormSpy)

[kopax]

Are you submitting a bug report or a feature request?

Bug

What is the current behavior?

When trying to reading the state from redux after saving it in redux, I have :

index.js:1 Warning: Cannot update a component (`Title`) while rendering a different component (`FormSpy`). To locate the bad setState() call inside `FormSpy`, follow the stack trace as described in https://fb.me/setstate-in-render
    in FormSpy (at FormStateToRedux.js:8)
    in FormStateToRedux (at CreatePromotionForm.js:308)

What is the expected behavior?

I expect no erros

Sandbox Link

Just use a component that is having

<>
 <Form>
    <FormSpy name="form" />
    <Field name="title" />
 </Form>
 <TitleFromRedux />
</>

What's your environment?

    "react": "^16.13.1",
    "react-native": "file:expo/react-native-sdk-36.0.1.tar.gz",
    "final-form": "^4.19.1",
    "final-form-arrays": "^3.0.2",
    "react-final-form": "6.5.0",
    "react-final-form-arrays": "^3.1.1",
    "react-native-final-form-material": "^1.0.14",

[gertdreyer]

Please see #985 (comment)