Both stationary and roaming clients lose their DHCP address at no specific interval but remain connected to the network.
This seems to happen more when roaming, but clients will be working normally and then suddenly have an APIPA address. Some users will obtain a new IP within a few minutes or moments, others have to disconnect and reconnect.
We have been working with Ruckus support for quite some time and have not yet been able to come to a resolution, so I was hoping someone may have had a similar issue.