I have been using event.state.session.history, but a recent change made it such that only the last few replies of the conversation is tracked using that variable. As such I have switched to tracking the conversation state/history manually through an array variable. Upon timing out, I'm sending a post request to a lambda endpoint to send emails that that include the conversation history. the variable i'm using to track the history works well when used in the main flow. But if i use the exact same code to send the post request in the timeout flow, the variable is undefined.