With Apple’s new software update (14.2) I’m using my two HomePods as stereo speakers for my Apple TV. This works well with the Tablo app, but sometimes when using commercial skip, the HomePods fall out of sync.
It only happens sometimes (maybe 10% of the time) but when it does one HomePod lags the other and you get this odd echo effect.
I haven’t seen this with other apps (I’ve been using Netflix and Amazon Prime mostly).
Again, it only happens when it automatically skips a commercial, and then not even most of the time. I can correct it by pausing, then resuming, the stream.