LivePage instances maintain server-side state that corresponds to the connection to the browser. Because of this, each LivePage instance can only be used to serve a single client. When you serve LivePages, make sure that you create a new instance for each render pass.
Here is an example(from Dominik Neumann) about using LivePage as a main page: Wrap you Index page like:
class RootPage(Index): ''' always return a new Index ''' def child_(self, ctx): return Index()