Gnome Bluetooth doesn't show service's name when an authorization is required

When I make a bluetooth access point with blueman and try to connect to it with another computer, I see a window asking an authorization. But it doesn't tell me what service is being requested, instead it prints out a long code:

Il dispositivo 'David96-Netbook-0' (00:21:85:EB:33:3A) vuole accedere al servizio «0000000f-0000-1000-8000-00805f9b34fb».
[*] Accorda sempre l'accesso
[Rifiuta] [Accetta]

Translation:
The device 'David96-Netbook-0' (###) wants to access to the service «0000000f-0000-1000-8000-00805f9b34fb».
[*] Always grant
[Deny] [Grant]

Moreover, this window is always under the other windows, it doesn't show in the launcher and doesn't require the focus.