How to allow UPnP traffic (Multicast) between multiple Rujie AP Wifi?

[color=rgba(0, 0, 0, 0.65)]AP820-L(V2)
I have a problem controlling my Sonos Speaker between multiple Access Points, although it is on the same subnet network. I am testing with the UPnP scanner from my mobile phone apps connected to the AP Living Room, to which my Sonos Speaker is connected; it can detect my Sonos speaker. I moved to another room, and my mobile phone was connected to the AP Main Bedroom; the UPnP scanner could not detect my Sonos Speaker.
Do you know how to configure my Ruijie Switch NBS3100-24GT4SFP-P to allow the UPnP traffic (Multicast) to pass between ports in the switch from the AP Living Room to the AP Main Room?

I am using Ruijie AP-820-L(V2). I connect The AP Living Room on port nine and the AP Main Room on port eleven in the switch.
I can do a ping test from my mobile phone connected to the AP Living Room to the device connected to the AP Main Room.
Thank you

Dear sir

May I know the how is the network topology looks like?

Best regards,
Ross