Pro-Ject Stream box S2 ultra

Hi, anyone here using this streamer and with the bug of the wrong A-Z sorting of artists under “My collection”? Artists are all there but in 2 series of A-Z, some in the 1st and others on 2nd (after the “Z” of 1st list). AFAIK this streamer integrates Volumio, I don’t know if Volumio comunity can help or if I can only ask Pro-Ject … ? Anyway, thanks for any help!