NAD C368+MDC BLUOS 2I - AIRPLAY PROBLEM

Hi,

I've got problem with connecting to NAD C368+MDC BluOS 2i through AirPlay with my iPhone or iPad. Access to other Airplay devices (e.g. Apple TV, Sonos Beam) works with both devices. However, the NAD C368 does not appear in the Airplay selection menu. 

I've upgraded firmware to the newest one (MCU 1.75 / VFD 1.22 / BT 1.26), restarted devices  and still the same. I have also updated the Bluos software to the latest version.

There's no visible NAD or BluOS option in my AirPlay menu.

I can connect my NAD through Bluetooth or BluOS app, so the hardware works fine. The C368 (serial number: H6ZC368G07707) is connected to the network by cable (no WiFi)

Any solution?