app updates have duplicated music library albums and lost some tracks

I’m having a similar issue - at least as it comes to compilations / soundtracks /etc. I’ve carefully tagged albums with tracks by different artists with a single Album Artist. It seems as though the indexing is ignoring the Album Artist tag and jumping to the Artist tag for each track and sorting it as though it’s its own album (or something like that).

Boggles the mind how they’ve made a mess of this core functionality - one I’ve been using on Sonos systems for 15 years or so. I’ve invested hundreds of hours of work in curating, tagging, and managing the data on my local music library, and now it’s a complete and utter mess (granted I’ve been using it all less since it’s such a pain to scroll to a band with a name that starts at the end of the alphabet).

Uunfortunately it's not just compilation albums

Thank you for posting this (I am replying in hopes that the more replies there are, the more likely sonos will address it…?) :-)

Some albums triplicated

Apologies. I used the word duplicates too loosely. There are multiple copies of some ( not all) albums and the same random songs are missing from each copy

Glad to see I’m not alone.  I was so happy to finally get my local library back onto Sonos.  Some artists and albums are well organized, other albums show up as many as four times.  And random tracks are out of order, despite the correct numbering on the CD and in iTunes.  Like a lot of you, I value my library and have curated the hell out of it for consistency and clarity.  Seeing the new Sonos app totally wreck it is both incredibly frustrating and, after all the aggravation the last couple months, totally unsurprising.  

No help I know, but I’ve got upwards of 18 copies of some albums. I rip and manage my CD library using Media Player, so I’m hoping that deleting and rebuilding the Sonos index will fix it for now.

Not sure I'd do that as I was told to delete and start again but it wouldn't reconnect. I spent hours on the phone and they escalated it sevetal times to no effect and eventually promised an engineer callback which never happened.

I subsequently had another go and miraculously it connected. A few weeks later  I've suffered the duplication/ missing song issue

I didn’t have a problem reconnecting, but the newly built library has as many duplicates as the old one! I see the Sonos director is apologising for the failed update - I guess we’ll have to wait for a proper fix. As a side-gripe - I hate it when they update the Android interface - it was much better and easier to use in its previous version.