[4.0.0] Form - Warning: Expected useImperativeHandle()

[crudo]

• I have searched the issues of this repository and believe that this is not a duplicate.

Maybe related to: #21693

Reproduction link

Steps to reproduce

Open reproduction link and look at the console.

What is expected?

no errors/warnings

What is actually happening?

See warning

Warning: Expected useImperativeHandle() first argument to either be a ref callback or React.createRef() object. Instead received: an object with keys {getFieldValue, getFieldsValue, getFieldError, getFieldsError, isFieldsTouched, isFieldTouched, isFieldValidating, isFieldsValidating, resetFields, setFields, setFieldsValue, validateFields, submit, getInternalHooks, __INTERNAL__, scrollToField}.
    in ForwardRef(InternalForm)
    in Unknown
    in div

Environment	Info
antd	4.0.0
React	16.13.0
System	MacOS 10.15.3
Browser	Google Chrome 80.0.3987.122 (Official Build) (64-bit)

---

After you click Submit, there is another warning:

Warning: Instance created by `useForm` is not connect to any Form element. Forget to pass `form` prop?

[afc163]

- <Form ref={form} layout="vertical" onFinish={handleSubmit}>
+ <Form form={form} layout="vertical" onFinish={handleSubmit}>