When I use Spotify Connect to connect to my Yamaha Receiver, radio stations do not load more songs when the current playlist runs out. This is true for any playlist with the similar songs feature turned on. When the playlist ends, the music stops playing, but the Spotify app seems to be stuck. The play/pause button continues to show a pause symbol, the timer does not count, and the progress bar stays at 100% full. Pressing next on the controls does nothing, and the bottom of the playlist continues to show "More songs load as you listen". This happens for the Android, iOS, and Windows clients.
Looking at the receiver, the song shows as Paused. If I press play using the remote it replays the last song. When I press next, it pauses the song again. This definitely acts like this is the last song in a playlist.
This is similar to this issue, but I'm unable to reply to that thread.