I updated nuxt to the lastest version and found a new problem, my page flash for one second after page refresh, it seems like css is not loaded before page render, but css is already existed before html tags.

<!--cmty--><!--cmty_prevent_hook--><div align="right"><sub><em>This bug report is available on <a href="https://nuxtjs.cmty.io">Nuxt.js</a> community (<a href="https://nuxtjs.cmty.io/nuxt/nuxt.js/issues/c1477">#c1477</a>)</em></sub></div>