MOS 9.0 set pmd-rxq-affinity failed

Steps to reproduce:
1. Create environment, add a host with >1 NUMA nodes as compute
2. Configure hugepages and DPDK CPU pinning
3. Turn on DPDK on one interface and move Private network to this interface, deploy cluster
4. Check OVS process CPU utilization and threads on compute, e.g. with "top -n 1 -bH -p `pgrep ovs-vswitchd`"
5. create a VM success

when I set VM port to the same cpu that dpdk isolated, there is a warning in ovs-vswitchd.log
   command is below:
   ovs-vsctl set interface vhu97b39354-ab other_config:pmd-rxq-affinity=“0:24"

   warning is below:
   There is no PMD thread on core 24. Queue 0 on port 'vhu97b39354-ab' will not be polled.

But from the pmd-rxq-show command, in the cpu 24, dpdk interface isolated
   pmd thread numa_id 0 core_id 24:
 isolated : false
 port: dpdk0 queue-id: 0

Why this warning happen?