Restoring AI Interaction in Custom Flows for Task Guidance

In many out of the box flows and most of my custom ones, I'm able to interact with the AI under Tasks to guide or change direction of whatever the task is that the AI is running. I recently re-architected one of my custom flows and ever since, the ability to comment/communicate via Tasks has disappeared. It's likely something obvious, but can someone guide me as to how I bring this back into this agent?