I don't know if there's anything with the way Intellij auto-saves files, but this very procedure works in every other text editor.
I'm using React and a lib called react-hot-loader responsible for the hot reload of the project.
The problem happens when: let's says I have a parent component and a child component. When I edit the parent component, everything works fine. When I edit the child component, the hot reload doesn't work (even if I refresh the page it doesn't work) so I have to re-run the project.
This, or similar, happened with anyone?