When a List is rerendered, the first listitem is replaced. If it has focus, it loses focus. The other listitems don't have this problem. Here's an [example](https://github.com/hexops/vecty/commit/9cf6eecb02dfac1320d992c08d0f647e597251a5) using the todomvc application. 
When a List is rerendered, the first listitem is replaced. If it has focus, it loses focus. The other listitems don't have this problem.
Here's an example using the todomvc application.