[1800] Async Data shows up in XHR after page return

When returning to a page with a async data functionality the AJAX call is fired. The XHR request seems to be refired and can be seen in the XHR request.

Is this a bug or how can this be avoided?

export default { async asyncData ({ params }) { let { data } = await axios.get('http://localhost:3532/api/afspraken') return { afspraken: data }