Apple Watch: App won't pause playback during Siri announcements

Whenever using the watchOS PC app while running and a Siri announcement comes in, PC will continue playing in the background for the duration of it, causing me to miss parts of the episode.

Apple Podcasts does this correctly: pause playback, make announcement, continue playback.

Start by locating the watchOS PC app's playback handling and how it receives Siri or audio-interruption events. Reproduce the issue while a Siri announcement is active, then verify that playback pauses for the announcement and resumes afterward without losing the episode position.

Written by the indexing model from the issue text.