Hello,I experienced the same issue on many routers with openvswitch-switch internal interfaces (aka SVIs).
Commenting out the status test in '/usr/share/openvswitch/scripts/ifupdown.sh' solves the problem.
#if /etc/init.d/openvswitch-switch status > /dev/null 2>&1; then :; else # /etc/init.d/openvswitch-switch start #fiAt my low level of understanding, this test conflicts with systemd networking initialization process.
HTH, -- - P h i l i p p e L a t u -- https://www.inetdoc.net