Indeed:
root@brave-horse:/home/ubuntu# tail -f /var/log/ovn/ovn-controller.log 
2021-01-27T10:27:24.331Z|00027|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:27:32.333Z|00028|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:27:40.336Z|00029|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:27:48.340Z|00030|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:27:56.343Z|00031|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:28:04.344Z|00032|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:28:12.349Z|00033|vconn|WARN|Dropped 5 log messages in last 40 seconds (most recently, 8 seconds ago) due to excessive rate
2021-01-27T10:28:12.349Z|00034|vconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: version negotiation failed (we support version 0x06, peer supports versions 0x01, 0x04, 0x05)
2021-01-27T10:28:12.349Z|00035|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:28:20.350Z|00036|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:28:28.352Z|00037|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Protocol error)
^C
root@brave-horse:/home/ubuntu# systemctl restart ovs-vswitchd
root@brave-horse:/home/ubuntu# tail -f /var/log/ovn/ovn-controller.log 
2021-01-27T10:28:12.349Z|00033|vconn|WARN|Dropped 5 log messages in last 40 seconds (most recently, 8 seconds ago) due to excessive rate
2021-01-27T10:28:12.349Z|00034|vconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: version negotiation failed (we support version 0x06, peer supports versions 0x01, 0x04, 0x05)
2021-01-27T10:28:12.349Z|00035|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:28:20.350Z|00036|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:28:28.352Z|00037|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Protocol error)
2021-01-27T10:28:36.356Z|00038|rconn|WARN|unix:/var/run/openvswitch/br-int.mgmt: connection dropped (Broken pipe)
2021-01-27T10:28:38.844Z|00039|jsonrpc|WARN|unix:/var/run/openvswitch/db.sock: receive error: Connection reset by peer
2021-01-27T10:28:38.844Z|00040|reconnect|WARN|unix:/var/run/openvswitch/db.sock: connection dropped (Connection reset by peer)
2021-01-27T10:28:39.845Z|00041|reconnect|INFO|unix:/var/run/openvswitch/db.sock: connecting...
2021-01-27T10:28:39.845Z|00042|reconnect|INFO|unix:/var/run/openvswitch/db.sock: connected
2021-01-27T10:28:44.356Z|00043|rconn|INFO|unix:/var/run/openvswitch/br-int.mgmt: connected
2021-01-27T10:28:44.358Z|00001|pinctrl(ovn_pinctrl0)|INFO|unix:/var/run/openvswitch/br-int.mgmt: connecting to switch
2021-01-27T10:28:44.358Z|00002|rconn(ovn_pinctrl0)|INFO|unix:/var/run/openvswitch/br-int.mgmt: connecting...
2021-01-27T10:28:44.399Z|00003|rconn(ovn_pinctrl0)|INFO|unix:/var/run/openvswitch/br-int.mgmt: connected
^C
root@brave-horse:/home/ubuntu#