SOLVED: Can't see other clients in the "cast to" devices list

[Mao899]

Well, I thought I had it solved. It definitely works better after moving the Jellyfin server to Host mode, but after remotely listening through my Windows Surface tablet for a few hours yesterday, I've come back to my PC to try to reconnect to the tablet again, and it's missing from the "Play on" menu again, as well as any other DLNA devices.