Hi Gumboots, I have the same question.
Since Millemissen is curious as to why, not that it matters, at my end, I’m trying to undo Multiroom and then re-set it up as I’m not seeing the same image I saw earlier with the first set up in my B&O app.
Maybe someone out there knows. If not, I’ll just ask B&O support. They’re pretty good at replying quickly and professionally. If I find out, I’ll post again.