https://wccftech.com/original-homepod-running-14-6-or-15-beta-update-are-failing-completely/

Several users online have reported that their original HomePod running the 14.6 update or the latest 15 beta have failed completely, bricking the smart speaker.

Reddit is filled with users complaining that their original HomePod failed after being updated to either 14.6 or 15 beta updates. There is no reason behind it at all, apparently.