the xbox streaming audio issue since 2023 Feb
It's been 4 months at least, may be you would talk to M$ to solve the audio stutter issues. And perhaps an increase on video bitrate.
If this is from the viewing perspective, please do let us know. At the moment Xbox is in charge of developing the broadcasting experience for the Twitch App, so it would be best to reach out to Xbox to report this issue. Thank you.