Have you contacted Ruckus about it?
I have reports of users "connecting" to the WLAN but not obtaining an IP address. I need to get more info, specifically their MAC, but I was thinking that if they joined the WDS (although I don't know why there is WDS) then perhaps this is why they think they connect. Shortly after they leave the WDS. As you say, very confusing. Any idea what is causing it and what the effect is?