The record
In a post dated December 6, 2022, a user says that general requests to turn lights on or off sent through their HomePod only ever affected the dining room light. Even after they removed that light from the Home app, Siri still confirmed the action while nothing changed. They report resetting their home setup twice, rebuilding it from scratch, and moving the HomePod to another room, with no improvement. This describes one household’s experience and is not evidence of a broader fault.
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A documented user report, not an independently reproduced test or an estimate of how often the problem occurs.