simplest reproduce for NM: ip link add dev test type bridge && ip link set dev test up && ip addr add 1.2.3.4/24 dev test && sleep 2 && ifconfig test && ip link delete test
simplest reproduce for NM: ip link add dev test type bridge && ip link set dev test up && ip addr add 1.2.3.4/24 dev test && sleep 2 && ifconfig test && ip link delete test