Can someone explain why 2 messages are being consumed for every message that I send? I understand why the first one might consume two messages because the bot is waking up and then is invocated to answer the question, but why are other messages consuming 2? Previously if a conversation had 6 messages the invocations would be 8 (1 extra beginning and end). Now 6 messages will consume 14 invocations (12 for the 6 messages and 2 extra for ending). Why?