Maybe a little OT, but I would like to know if this is an issue related to my phone/bluetooth, to Libreoffice or to Fedora 27.

I would like to use Libreoffice Impress remote and the related Android app [1].
In a nutshell it doesn't work: the app doesn't see the remote Libreoffice session, even if the PC and the Android phone are paired.

In journalctl the message that appears when I launch Libreoffice Impress is:

Oct 18 16:59:32 host bluetoothd[6358]: RFCOMM server failed for LibreOffice Impress Remote: rfcomm_bind: Address already in use (98)

[1] https://wiki.documentfoundation.org/Documentation/HowTo/Impress_Remote_(Android)

Ciao,

Alessio