Is this the behavior you want? I’m asking out of curiosity more than anything else. I often see people make this mistake of trying to go backward in the songs they’ve queued and finding out that they can’t. Personally, I think it’s more intuitive to have the back button always take me to the song that was just playing. I want to be clear that I’m asking what you would prefer not what you think is technically correct.
Also, is this how things work in Apple Music as well?