He plugin: LLDP speaker does not start/stop sending LLDP packets on port up/down events

1) Start karaf
2) Enable below features
feature:install odl-openflowplugin-flow-services-ui
feature:install odl-l2switch-loopremover

3) Now connect a topology of two switches in linear and no hosts

mn --controller=remote,ip=10.11.200.3 --topo linear,2,0 --switch ovsk,protocols=OpenFlow13

3) Check the number of links discovered. It is 2. One in each direction.
4) Now type exit in mininet
5) Repeat step 3 one more time.
6) Check the number of links discovered. I see only one link.
7) Packet captures revealed that controller did not send lldp discovery on one of the switches.
8) If I connect a linear topology of 2 switches with one host each I dont see this problem.
mn --controller=remote,ip=10.11.200.3 --topo linear,2,1 --switch ovsk,protocols=OpenFlow13

Attaching the packet captures for step 3 and 5.