Frequently affects both cps and tput, low and high scale, even det44.
Not seen in tcp tests yet.
Packets are lost in server->client direction, but so far all teardown trials see zero loss.
Example: [0].

[0] https://s3-logs.fd.io/vex-yul-rot-jenkins-1/csit-vpp-perf-report-iterative-2310-2n-icx/42/log.html.gz#s1-s1-s1-s2-s54