I’m not sure how to interpret your question regarding the “same song”. When I search a song that is not in my library, the album art appears on the interface, but the song cannot be played.
It seems that access to streaming is intermittently successful…sometimes briefly possible followed by the standard warning messages, and sometimes not at all possible, with the same messages. We have a fiber line here and live radio is perfect, as is access to NAS based music. It seems that this is an issue you are aware of…please clarify. I am checking with my IT tech to see about your ISP question.