Using a SDN VNET with a VLAN already present on Proxmox

On my nodes i have this

enp0s31f6 -> vmbr0 -> vmbr0.16 Proxmox Management network
vmbr0.1000 Cluster network
SDN -> lzone

Network is a VLAN SDN zone

i have working VNET on lzone
e.g.

lnet10 - VLAN 10
lnet20 - VLAN 20

Attached to this zone, which is able to communicate with devices across the network including physical devices.

However when creating lnet16 - VLAN 16, that node that it gets applied to is no longer reachable on the Management...

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