Customer saw traffic statistics in the EF/AF queues even if the interface doesnt have CoS configured.

From Core1 to EDGE-01, we can see EF queue hits, from EDGE-01 downstream egress, no EF queue hits.

To understand this, it would be good to know a packet is treated on its way through the CoS process by following this JUNOS technical document.

https://www.juniper.net/documentation/us/en/software/junos/cos/topics/concept/packet-flow-cos-process-cos-config-guide.html