In AI Agent Studio, check if your agent's final step has an explicit "display to user" action — if the VA topic is already handling display, the agent shouldn't also be pushing a separate output. Third, check the conversation logs in sys_cs_conversation and sys_cs_message tables to see if two distinct messages are actually being created, or if it's a single message rendered twice on the UI (which would point to a front-end/widget issue instead).
If the logs show two separate messages being inserted, it's the topic/agent flow. If it's a single message rendered twice, it could be a known VA chat widget rendering bug
