Intermittent packet drop seen when running UDP mesh flow tests with 4096 flows per port in b2b topology

[ashutshkumr]

Describe the bug
Tx and Rx count for some flows in the UDP header mesh flows test do not match towards the end of the test when 4096 flows are configured for each port in b2b.

To Reproduce

git clone https://github.com/open-traffic-generator/conformance.git
cd conformance && git checkout c2c306b

./do.sh topo new cpdp
./do.sh pregotest

OTG_ITERATIONS=2 ./do.sh gotest -tags="perf" -run "^TestUdpHeaderMeshFlowsPerf$"

• Test Link: https://github.com/open-traffic-generator/conformance/blob/c2c306b4e219cb6606cd2a3d1a6eeba1b56f04c5/performance/flows/udp_header_mesh_flows_perf_test.go
• Failure logs: https://github.com/open-traffic-generator/conformance/actions/runs/3959361872/jobs/6782085950
• Diagnostics: https://github.com/open-traffic-generator/conformance/suites/10466195810/artifacts/518327292

Expected behavior
The packet count for tx and rx should be equal for all flows.

Versions (please complete the following information):

• OS: Ubuntu 22.04
• Go: 1.18
• Ixia-C release: 0.0.1-3722
• snappi release: 0.10.4