When can shouldComponentUpdate still render?

Question

React

I do it like this:

shouldComponentUpdate(nextProps, nextState) {
    return false;
}

The component still renders. There are more than 1000 props and lines in the component, I don’t give all the code. I read in the documentation that

Currently, if shouldComponentUpdate() returns false, then UNSAFE_componentWillUpdate(), render(), and componentDidUpdate() will not be called. In the future, React may treat shouldComponentUpdate() as a hint rather than a strict directive. In such a case, returning false can cause the component to re-render.

How do you know when shouldComponentUpdate is taken as a recommendation and when as a rule?

Answer 1

Maybe forceUpdate is called somewhere, it works past shouldComponentUpdate