Okay, so the client would not get an IP until it authenticated. So using B@AP is not an issue, the clients will always get the ip from the Authenticated role. Contacting GTAC would probably be your best option, someone will look at the client state when it roams back into the network. It should try and probe the nearest ap then attempt to attach again...
I go home at night, then come back into the lab in the morning and my phone hooks right back up. I'm using b@ap tagged for my topology.
Doug Hyde
Director, Technical Support / Extreme Networks