Switch Disconnect+Connect to Ownership Candidate fails

As shown in the Switch Disconnect test below:
https://jenkins.opendaylight.org/releng/view/CSIT-3node/job/openflowplugin-csit-3node-clustering-only-boron/

To reproduce:

• Connect switch to 3 controller instances
• Find out Owner and Candidates
• Disconnect switch from candidate (2 in the example)
• Reconnect switch to candidate (2 in the example)
• Connection fails according to OVS logs (sudo ovs-vsclt show):

Manager "ptcp:6644"
Bridge "s1"
Controller "tcp:10.29.11.225:6653"
is_connected: true
Controller "tcp:10.29.11.226:6653"
Controller "tcp:10.29.11.227:6653"
is_connected: true
fail_mode: secure
Port "s1"
Interface "s1"
type: internal
Port "s1-eth1"
Interface "s1-eth1"
ovs_version: "2.0.2"