High Latency and Packet loss

I ran the Ookia speedtest.net application and took a Wireshark packet capture to see how that works. At the beginning of the session between the client on my machine and the speedtest.net server I was testing against I could see a series of pings and ALL of them were fails as no response to the ICMP packets sent by the ping utility. The two host connect via a TCP session and there are packets targeted to port 8080 from a different port(s). Depending upon the packet type/content the source port would change. Now if Ookia tunnels some ICMP packets between the two hosts or just has an alternate calculation for the latency, which may be, then it can and does report the value. From what I have seen in the capture the volume and rate of the packets from one client to the other are at a rapid rate so I recorded duplicate ACKs and retransmissions etc… It appeared rather chaotic at times but the test did succeed and values were reported. If they do run an MPLS tunnel for some of the session or not I cannot say but it works. Of the 22 ICMP packets sent all failed so not sure how the value was pulled except for the session establishment via the TCP handshake.