Did you get this resolved?
I've previously used UBNT client devices (NanoBeam M5) with Ruckus APs and observed some anomolies. The main one being DHCP traffic couldn't traverse the link, however if a client was given a static IP then all worked as expected. Have you tried this?
I resolved the issue by enabling Tunnelling on a local ZD. Alternatively I did have some success with changing the config of the UBNT device to be a WDS client but this did result in the UBNT device not being available for remote management on the Ruckus side of the network.
I hope that helps,