I have only one connected component at the top level for the whole application.

I made some tests, and the problem is the following:

I have 2 reducers (locale and products). Only one of them is connected to the app with mapStateToProps.

const mapStateToProps = state => ({
    locale: state.get('locale'),
});

But if I update the products reducer that is not connected to the app, The mapStateToProps is anyway called and so on it will trigger my application re-rendering !

Why this behavior since products is for sure updated on my store but is not connected to the app ???
Normally it should skip the re-rendering process since that state part is not mapped to any props.

Versions:
"react-redux": "^4.4.5",
"redux": "^3.5.2",