onEnter called multiple times

EDIT: A much simpler way to reproduce

```
console.log('Home page')}/>
```

Shows `Home page` 3 times. Twice on the client console, and once on the server side.

I'm keeping the below just for reference, otherwise the above is enough to replicate the problem.

---

I've seen some references to this issue elsewhere, but the fixes outlined (using react-router-redux, check for multiple dispatches) seem to be taken care of.

I've added this to my routes file:

```

```

And this is the `onEnter` function

```
import {verifyEmail} from 'redux/modules/user';
import {createFlashMessage} from 'redux/modules/flash';

export function verifyEmailAndRedirect({dispatch}) {
return ({params: {token}}) => {
dispatch(verifyEmail(token))
.then(
// Success
({message}) => {
dispatch(createFlashMessage(dispatch, message, 'info', true));
},
// Failure
message => {
dispatch(createFlashMessage(dispatch, message, 'danger', true));
}
);
};
}
```

The URLs associated with this route are never linked to in the app, so a fresh app load will always occur. Therefore, whenever I test this, I refresh the page with a URL that will trigger this route. What I've noticed however, is 3 flash messages are always created. If I place a `console.log` call just before the `verifyEmail` dispatch, I get 2 calls on the client, and 1 on the server.

If I use react-router's async `done` callback, I get 2 rendering, and a warning in my console telling me that the server render and the client render are different.

Anyone have any idea where I might start troubleshooting this issue? I'd rather not hack around the problem with debounces.