CLONE MB-23694 - Encrypted XMEM XDCR uses port 8091

Steps to reproduce

1. Configure two one node cluster
2. Enable uni-direction XDCR from cluster one to cluster two using TLS
3. run a tcpdump on cluster 2 capturing all the traffic from cluster one

   sudo tcpdump -lvni [INTERFACE] -w /vagrant/xdcr.pcap host [CLUSTER ONE IP ADDRESS]

Problem

When reviewing the tcpdump, there is traffic over port 8091:

While this is a small amount of traffic I would expected there to be none.

Expectation
All communication to be over encrypted ports

Logs

Tcpdump:
[^xdcr2.pcap]