SXK80: mDNS not working as intended across VLAN

Using a previous thread as a guide (https://community.netgear.com/t5/Orbi-Pro-WiFi-for-Small-Business/SXK80-Allow-Specific-Client-s-across-VLAN/m-p/2160469) I've been unsuccessful in getting this to work properly.

I am having issues with mDNS and access across VLANS. My network VLAN setup and isolation settings are the same as Anthony-L in the above thread. I enabled mDNS Gateway and added the appropriate policies. Multicast broadcasting appears to be working as I can see devices populated in the mDNS Gateway Discovered Services list and they are discoverable from source VLAN devices. This is as far as it goes. Further communication between devices is not working. For example, a laptop on VLAN 1 (Default) is able to discover and add a printer on VLAN 30 (Iot), but unable to print to it. The same goes for AirPlay –– VLAN1 device can see an AppleTV device but it will not connect and AirPlay/cast. There is no problem when devices are on the same VLAN.

I have reboot the router, satellite, AppleTV, iPhone, laptop, and re-enabled the intended isolation options. My understanding is that even if network isolation is enabled, mDNS Gateway will allow the inter-VLAN communication. It appears that @Anthony-L was successful in communicating between network isolated VLANs as well one not network isolated.

Firmware V4.2.3.102

Network VLAN Config

• VLAN 1 (Default) (Wireless 1)
  iPhone, Laptop
• VLAN 20 (Employee) (Wireless 2) - Network Isolation
• VLAN 30 (Iot) (Wireless 3) - Network Isolation
  AppleTV, Chromecast
• VLAN 40 (Guest) (Wireless 4) - Client & Network Isolation

mDNS Gateway Policies
All services for ease of testing

• Policy 1, All Services, Source VLAN 1, Destination VLAN 30
• Policy 2, All Services, Source VLAN 30, Destination VLAN 1

BruceGuo Any suggestions to get this working properly?

Thanks!