VSCode extension freezes/dies after ~20 seconds of inactivity

Bug Description

The Claude Code VSCode extension session dies/freezes after approximately 20 seconds of user inactivity. This has been occurring consistently for approximately 1 month.

Environment

• Extension version: 2.1.5
• OS: macOS (Darwin 24.6.0, Apple Silicon)
• VSCode: Latest
• Connection: Stable (53ms ping to api.anthropic.com, 0% packet loss)

Steps to Reproduce

1. Open Claude Code in VSCode
2. Start a conversation
3. Pause typing/interaction for ~20 seconds
4. Session becomes unresponsive/dead

Expected Behavior

Session should remain active during brief periods of inactivity.

Actual Behavior

Session freezes and requires restart after ~20 seconds of no interaction.

Notes

• Mac power settings are normal (10 min display sleep)
• Network connection is stable and verified
• CLI version (claude in terminal) does NOT have this issue
• Issue persists across VSCode reloads

Workaround

Using CLI directly instead of VSCode extension.