A misplaced 'finally' clause silently broke an AI phone agent after every first reply

A developer building an AI receptionist for a real landline discovered that callers were greeted correctly but the agent stopped responding after the first exchange, with no errors or exceptions raised. The WebSocket connection to the speech provider remained healthy throughout, making the bug nearly invisible to standard monitoring. The root cause was a Python 'finally' block inside an async generator that marked the connection as closed whenever a 'break' statement exited the loop at the end of each conversational turn. Since the agent checked the 'is_connected' flag before listening for follow-up audio, it silently refused to process any further input despite the socket being fully operational. The fix involved removing the cleanup logic from the generator itself and delegating connection teardown to a dedicated close method, ensuring a consumer breaking out of iteration no longer mimicked a genuine disconnection.