Flows are not getting Programmed on DPN's when statistics are turned off(is-statistics-polling-off=true)

Flows are not getting Programmed on DPN's when statistics are turned off(is-statistics-polling-off=true) whereas it works fine when the statistics are turned ON(is-statistics-polling-off=false)

Scenario Execution Step:
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1. Start the Controller and connect Mininet

2. Disable Statistics(is-statistics-polling-off=true)

3.Add Bulk Flow(1000 flows) Controller Node

4. Get Bulk Flows and Verify In Cluster config DS all flows are installed

5. Verify Flows In Switch , The test is failing in this step. no flows are seen
on the OVS switch.

Attached are the karaf logs