ISS ongoing research

ISS discovered by @tomzhenghedera, incident channel: #incident-20250116-triage-perf1-v58-iss research is ongoing.

The issue points to incident channel #incident-20250116-triage-perf1-v58-iss and says research is ongoing. Start by reviewing that incident context and the discovery details from @tomzhenghedera; the issue does not name files, tests, an entry point, or a definition of done, so clarify the expected outcome before making a change.

Written by the indexing model from the issue text.