Listen Everywhere uses mDNS to for device discovery, hence one of the settings which you should consider to play with is 'Directed MC/BC Threshold' under WLAN's advanced settings.
Set this value to '0'. When set to '0', this basically stops Ruckus APs to convert MB/BC to unicast for specific WLAN.
Apart from this, if the Listen Everywhere server and clients are connecting to two different VLANs/network, then you have to configure bonjour gateway, because mDNS is layer-2 protocol, which means it will be limited to single broadcast domain, until you configure a gateway (bonjour gateway) between source to destination VLANs.
There is an article as well for our vSZ solution which explains setting-up Listen Everywhere bonjour gateway, you may refer it for more details.https://support.ruckuswireless.com/articles/000008942
I hope this will solve your problem.
Syamantak Omer | Community moderator | Staff TSE | CWNA | CCNA | RASZA | RICXI | Follow me at https://linkedin.com/in/syamantak-omer-5949b6124