Bridge eth0 / eth1

RancherOS
1

For a special use case with my home box I tried to bridge eth0 (ext interface) with eth1 (int interface). eth2 is configured with a static ip address.

After reading the documentation / bridge example I tried:

rancher:
  network:
    interfaces:
      br0:
        bridge: true
        dhcp: true
      eth0:
        bridge: br0
      eth1:
        bridge: br0
      eth2:
        dhcp: false
        address: 10.10.10.1/24

But after reboot br0 was created with eth1 only and eth0 was configured with the dhcp ip address.
Expected was a br0 with eth0 and eth1?