I am try to add some CSS to my components. However, when the website renders the custom CSS is always removed. I am styling my own pages and do not override the CSS of third parties, at least not consciously. I am using Material UI and NextJS and realised that while following this that all server-side CSS is removed. I suspect that this is the issue, but not sure how to work around it. The CSS is just custom to the component and follows the naming convention of Next :
[filename].modules.css
Does anyone know what do do?