Read the saved-track behaviour
HBO Max’s UK accessibility help says choosing Audio Description makes it the default audio track for other shows and films when available. If descriptive narration continues after moving to another item, inspect the selected audio label before assuming a separate voice-control app or an unexpected second stream has started.
Separate narration from language dubbing
The accessible track describes visual events between dialogue. Another language soundtrack and a device screen reader have different purposes. Keep the actual Audio and Subtitles selection with your observation. The UK help qualifies the language availability, so do not assume every title provides description in every language supported by the menus.
Make an intentional preference choice
If narration is wanted, check the intended episode’s indicator and offered track before relying on it. If it is not wanted in that session, use the player’s actual audio selection to choose another available track. Preserve the needs of anyone sharing the profile rather than treating an intentional accessibility preference as a fault to remove permanently.
Inspect the device layer if it returns
HBO Max also advises checking device accessibility preferences if narration continues after the in-app change. Record both layers and the exact title before requesting support. A descriptive track not offered on one episode is a different question from an offered track remaining selected, and neither result establishes the status of an unrelated viewing subscription.
Questions, answered
Can Audio Description become the default for another available title?
Yes. HBO Max explicitly documents that behaviour.
Is description necessarily offered in every menu language?
No. The UK help qualifies language and title availability.