Can the algorithm be disconnected from local library Shuffle?

How could it be repeating songs?  It’s a queue, it will play in shuffled order, and if there are no songs entered more than once and you are only shuffling once, how can there be repeats? 

fantastic question. that’s why i’m here.

There is a playlist bug in the current firmware. If you load a playlist of like 100 tracks or more the player will add the playlist repeatedly until it maxes at somewhere over 50k tracks. Hit play on a large playlist and watch the queue grow. There’s a thread on this here somewhere if you want to look for it. Your repeats could be related to this. Maybe.

The only way you could be repeating songs in this scenario is if you are leaving the queue for another source and going back to it later.  Otherwise, the queue would have to be reordering itself, and that’s something which would cause a heck of a lot more furor than a single thread with a single poster. 

I appreciate your input ​@jgatie, but that is not the behavior I have been seeing. Single sitting over several hours, no leaving the queue for another source, very large playlist (would take days to get through), no duplicates in the playlist, multiple songs repeated across several hours and a heavier preference of bands over that time that have already been played.

Are the songs in the playlist from a local library or a streaming service?

If they are on a streaming system you may be able to use the history there to confirm the behaviour that you are seeing. This would certainly work for Deezer but I don’t know about others.

I would do the following:  Start a playlist, hit shuffle, then write down each song as it plays.  Once you hit a duplicated song, check the queue to see if the queue pointer is a) Pointed at that song and b) In the same position on your list of songs as before.  Report the results to Sonos support, along with a diagnostic.

I had the duplication issue with M3U playlists that were longer than a certain track count ( not sure of the exact track count ).  The playlist that first caused this duplication was 378 tracks long.

One solution, hopefully temporary. Is to use SonoPhone to load the playlist.  Then when you open the playlist in the new 80.x Sonos app it will NOT have been duplicated.  Also works using the old orange Sonos app if you have access to it.

When you shuffle a playlist is it being shuffled the same way every time where you see, as an example, the 5th track is always the same track as the last time you shuffled?  If not that then maybe it’s looking at what’s been played the most times and favoring those.  Those “played the most” tracks would obviously be the ones you listened to in the last listening session since you’re not going to get through the whole playlist.

​@EbayYellow This looks promising, my queue when any playlist is playing is 55K+ songs. I’ll keep an eye out for that thread.

 Found out the Sonos PC app also loads a playlist properly, no duplication.

Good news/bad news I guess. At least you know the issue, now we just wait for Sonos to fix it and hope they don’t f up something else. 
 

Cheers to ​@MoPac for the SonoPhone and desktop app suggestion. Only tried SonoPhone so far, works good.