pipecat/changelog/4389.fixed.md

• Fixed AWS services failing silently on missing or invalid credentials. AWSNovaSonicLLMService, AWSBedrockLLMService, AWSPollyTTSService, and AWSTranscribeSTTService now push a fatal ErrorFrame with a "check AWS credentials and region" hint on auth-class failures, so the pipeline cancels promptly instead of continuing to run with no output.
• Fixed AWSNovaSonicLLMService._disconnect raising InvalidStateError from awscrt/aio/http.py when cleanup ran on a stream from a failed invoke_model_with_bidirectional_stream call. The error was masking the real connect-time auth failure in the logs.