Configuring two network interfaces in proxmox 8

[anaranjo]

Hello,
I recently configured a Proxmox 8.1 server with 2 network interfaces with two different networks

auto lo
iface lo inet loopback

iface eno8303 inet manual

iface eno8403 inet manual

iface eno12399np0 inet manual

iface eno12409np1 inet static

auto vmbr0
iface vmbr0 inet static
        address 192.168.1.140/24
        #gateway 192.168.1.9
        bridge-ports eno8303
        bridge-stp off
        bridge-fd 0

auto vmbr1
iface vmbr1 inet static
        address 192.168.10.140/24
        gateway 192.168.10.9
        bridge-ports eno8403
        bridge-stp off
        bridge-fd 0

The problem arises when the interface vmbr0 is disconnected, since the connection is also lost on the interface vmbr1