Samsung R1 speaker and multiroom App issue

[Glazze]

Hi,
I’m hoping someone can help, I’ve purchased 2 R1 speakers and set up each on the multiroom app
However I can only see the speaker on the app if i’m in the same room as it
If I leave the one room the speaker in that room disappears from the app and picks up the other speaker in the new room and vice versa
So I know both speakers are connected - I just can’t see them both at the same time in the app to group / play music through together
Any advice would be appreciated

Many Thanks