Naim app and Asset: issue with hypen sign

I recently bought a new Qnap NAS since my old one couldn’t run Asset.

I have a strange issue with the Naim app and Asset.

I use the hyphen sign a lot when editing the metadata of my music files (example: “Wiener Philharmoniker - Nikolaus Harnoncourt” as artist or “Jazz - Vocal” as genre).

When I browse Asset with the Naim app, it only diisplays the first part of those tags.

For example “The London Symphony Orchestra - Sir Colin Davis” displays as “The London Symphony Orchestra”

or

“Classical - Baroque” and “Classical - Medieval” are displayed as two different folders when browsing by genre but both with the name “Classical”.

That makes it impossible for me to browse my collection properly.

It only happens when browsing Asset with the Naim app.

It doesn’t happen if I browse Asset with other clients (I checkked with MediaConnect on my tablet and PlugPlayer on my Mac)

It doesn’t happen when I browse MinimServer with the Naim app.

Anyone having the same problem? Is it a known issue? Is it a Naim or Asset issue? Am I condemned to retag most of my files if I want to use Asset with the Naim app?

Sorry for my bad english, I hope I was clear enough.
Cheers
Nicolas