mapFromValue does not work, sends syntheticEvent instead of value

Example:

 <Form.Field
                id="eMail"
                name="eMail"
                placeholder="Email"
                className="form-control"
                autoComplete="email"
                errorClass="is-invalid"
                value={model.Email}
                mapFromValue={
                  emailValue => {
                    console.log("email value: ", emailValue);
                    return emailValue;
                  }
                }
              />

mapFromValue does not work as expected and as written in documentation:

<Form.Field
  name='name'
  mapFromValue={fieldValue => fieldValue.first + ' ' + fieldValue.last}
/>

fieldValue in this example is received as syntheticEvent.

email value:  SyntheticEvent {dispatchConfig: {…}, _targetInst: FiberNode, nativeEvent: InputEvent, type: "change", target: input#eMail.form-control, …}

Forgot to add that it releated to version 1.0 and you can easily reproducit it by going to Examples and trying to enter date in appropriate example

[jquense]

These docs are a little out of date I think. React formal will automatically extract value from a synthetic event but if you do the mapping yourself you would need to handle it. In other words you whatever the input passed to onChange. In the case of default native input it's the change event