Currently the helper script /usr/libexec/vyos/completion/list_interfaces.py only supports a single interface type
$ /usr/libexec/vyos/completion/list_interfaces.py lo eth0 eth1 gre0 gretap0 erspan0 tun666
$ /usr/libexec/vyos/completion/list_interfaces.py -t ethernet eth0 eth1
but specifying two types results in no result at all:
$ /usr/libexec/vyos/completion/list_interfaces.py -t ethernet -t bridge
but the expected result would be:
$ /usr/libexec/vyos/completion/list_interfaces.py -t ethernet -t bridge eth0 eth1 br0 br1