Hi, @Sasha55
Thanks for posting, and welcome to the Roku Community,
We appreciate you for sharing your concern here with us, and we'd be happy to help you get in touch with the proper support to address your concern.
We would recommend reaching out to Netflix's support directly and letting them know about the issue you have noticed with one of their shows exhibiting no audio. Channels and app providers are directly managed by the channel providers, and they'll be able to provide you with a workaround or update their channel to resolve an issue.
For more information, you can reach them at Netflix | Help Center
We hope that this will be sorted out soon, and feel free to let us know if you have further concerns or inquries.
Best wishes,
Kash
Takashi O.
Roku Community Moderator