The record
In a post dated October 12, 2022, a user says Siri on their HomePods, running software 16.0, stopped finding anything from the Apple Music catalog that morning. Siri would acknowledge the request, then say it was taking too long or could not find the item. Their own playlists still played on request, and Siri on their iPhones handled Apple Music normally. They restarted the HomePods and their network without success. This is a single user’s report from one day.
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A documented user report, not an independently reproduced test or an estimate of how often the problem occurs.