This issue is specific to bridge mode SSIDs. Even though the client IP address is not reflected on the controller, but in actual it does has an IP and able to put its traffic over the network.
Appears a limitation in Aruba code, that the clients in bridge mode and connected on to Mesh points will not have their IPs reflected on controller.
For the clients that are in tunnel mode and connected on to the Mesh points, have their IPs reflected on to the controller.