My partner and I have a Spotify duo account. While I can generally easily stream music from Spotify to our Onkyo amp over wifi, my partner can connect sometimes but then her phone and computer simply stop "seeing" the amp anymore, it stops appearing on the Available Devices menu. It is not the amp that causes problems as its possible to connect to it via the Onkyo app, and I can connect and stream to it. Any idea why her Spotify suddenly "stops seeing" the amp and what we can do to prevent that from happening?
Phone and laptop