RaspberryPi4/EAP225 with vlans not working

I have looked at multiple forum posts as well as tutorials and am stuck.

I have a rPi4B configured as a "router on a stick" using multiple VLANS on managed Netgear switches. All works well with the physical network connections, but I have tried multiple versions of Bridged VLAN configurations on the EAP225 with no joy. The connection almost completes but it appears that the clients do not receive DHCP addresses and there is a resulting failure.

I flashed the AP firmware back to stock and have no issues whatsoever, so I know that my VLAN configs are good. I must be missing something simple.

Is there anyone out there who has successfully configured an EAP225 in "dumb AP" mode who can help me out?