Observing tx_dropped or rx_dropped on internal bridge ports in OpenvSwitch

Issue

Observing tx_dropped or rx_dropped on internal bridge ports in Open vSwitch in Red Hat OpenStack Platform

[root@overcloud-compute-0 ~]# ovs-vsctl get interface br-sig statistics
{collisions=0, rx_bytes=0, rx_crc_err=0, rx_dropped=0, rx_errors=0, rx_frame_err=0, rx_over_err=0, rx_packets=0, tx_bytes=0, tx_dropped=394562, tx_errors=0, tx_packets=0}