I can see some albums duplicated on iphone but not on ipad. The same Rock, only my ripped albums. I cleaned cache reinstall Roon client on smartphone. Inspektor didn't found duplicates. I have only 70 Cds ripoed but many albums is visible as duplicates. Not all and only on iphone
To echo @BlackJack, please verify whether you have Show Hidden Tracks and Albums toggled “On” or “Off.” This setting is remote-specific and will impact how many versions of an album are displayed in the Browser.
For me no changes after switching (was off). And I have only one JMJ album.
But 2 days later it looks OK so it is fixed but not sure why
I also have indeed 2 version of the same album another artist but it looked ok. Maybe iPhone restart due to iOS update fix it…
Anyway thank and for sure I will monitor it in the future