Problem with album display

[Lio84]

Hello
I have a problem with an album which appears 13 times in the Naim app with the same name:
- the album has 56 tracks
- the files are located in 13 different folders named CD 01, CD 02, ... CD 13 under the same parent folder
- All the files are tagged with the same album name and with track number 1, 2, 3, ... 56
- Discnumber = 1
- Disctotal = 1
- All the files have the same front cover

It seems like the apps displays 1 album per folder.
All the other albums display correctly.

Configuration
- MinimServer 2.2 update 253 on Melco Server N1A
- Streamer Naim audio 555
- Naim app on IPAD