ifup@%i.service systemd unit file can't be restarted for br0 device

[CH]

On Ubuntu 20.04 and 22.04, we've configured a bridged device (br0) in /etc/network/interfaces like this:

auto br0
iface br0 inet static
        address 172.16.201.5
        netmask 255.255.255.0
        broadcast 172.16.201.255
        bridge_ports none

If we run `ifup br0` or `ifdown br0`, everything works perfectly.

If we run `systemctl restart ifup@br0`, br0 goes down but doesn't come back up. It prints this error:

    A dependency job for <email address hidden> failed. See 'journalctl -xe' for details.

The command `systemctl status ifup@br0` says (in part):

    Mar 13 15:09:10 example.com systemd[1]: <email address hidden>: Bound to unit sys-subsystem-net-devices-br0.device, but unit isn't active.
    Mar 13 15:09:10 example.com systemd[1]: Dependency failed for ifup for br0.
    Mar 13 15:09:10 example.com systemd[1]: <email address hidden>: Job <email address hidden>/start failed with result 'dependency'.

The lines in /lib/systemd/system/ifup@.service that seem to be causing the problem are:

    BindsTo=sys-subsystem-net-devices-%i.device
    After=sys-subsystem-net-devices-%i.device

Versions tested+affected:
    ifupdown/jammy,now 0.8.36+nmu1ubuntu3 amd64 [installed]
    ifupdown/focal,now 0.8.35ubuntu1 amd64 [installed]

Our workaround is to use `ifdown br0` and `ifup br0`, but it'd be nice if systemd could handle it.

Thanks