NAT to WiFi interface not working with simple SDN

I've been trying to setup a laptop with Proxmox for working on the road.

I have no bridge configured, only a WiFi interface. The laptop is a member of my home development cluster, and everything seems to work perfectly.
The WiFi interface on the laptop and the vmbr0 interfaces on the other cluster members are in the 192.168.1.0/24 subnet.

I setup a simple SDN zone with a 192.168.2.0/24 subnet. A VM on one of the other nodes works perfectly.
I can SSH into that VM from the host node, and...

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