Agent Debug logs not logging subagents anymore

[diridevelops]

• Copilot Chat Extension Version: 0.43.0
• VS Code Version: 1.115.0
• OS Version: any
• Feature: Agent Debug logs
• Selected model: any

Agent Debug Logs only shows logs for the main agent. Subagents logs which used to be shown in purple boxes in the Agent Flow Chart are not logged anymore.

Steps to Reproduce:

1. Open a new Copilot Chat session in agent mode.
2. Ask the agent to run subagents in parallel, for example two Explore subagents.
3. Wait for both subagents to complete successfully and return results in chat.
4. Open Agent Debug Logs / Agent Flow Chart for that session.
5. Observe that the flow chart does not show the subagent steps that used to appear as purple boxes.