My Sonos system has just started doing this - it’s like someone has pressed the start/stop button as it resumes the radio station we normally listen to, except... louder.
So far it’s done it three times:
05:33 on Monday;
05:35 on Friday;
05:37 on Sunday.
I’m struggling to see those times as random, or as times that some external influence would pick.
Yes we do have cats, but after Monday (when I assumed they were the cause) and after reading similar threads here, I checked on Friday and Sunday and none of them were near the bedroom unit at the time (the only one they can get to overnight); all were fast asleep elsewhere.
No we don’t use Spotify. Or IFTTT.
Diagnostics 501954724 submitted immediately on Sunday... any feedback gratefully accepted.