[BUG] Monitoring(OpenTelemetry) is broken since 2.64, still not working in 2.67 (latest version)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code Opentelemetry feature is broken.
Broken means it does not produce any logs / metrics.
It does not produce metrics / logs even after we configure that.

What Should Happen?

After we configure the telemetry setting, the claude code should produce metrics / logs.

Error Messages/Logs

No error messages found.

Steps to Reproduce

~/.claude/settings.json

{
  "env": {
    "AWS_PROFILE": "<AWS ROLE>",
    "AWS_REGION": "<AWS REGION>",
    "NODE_TLS_REJECT_UNAUTHORIZED": 0,
    "ANTHROPIC_SMALL_FAST_MODEL_AWS_REGION": "<AWS REGION>",
    "CLAUDE_CODE_USE_BEDROCK": 1,
    "ANTHROPIC_MODEL": "<Model Inference Profile ID>",
    "ANTHROPIC_SMALL_FAST_MODEL": "<Model Inference Profile ID>",
    "ANTHROPIC_CUSTOM_HEADERS": "X-Amzn-Bedrock-GuardrailIdentifier: <GuardrailID>\nX-Amzn-Bedrock-GuardrailVersion: <GuardrailVersion>",
    "CLAUDE_CODE_ENABLE_TELEMETRY": 1,
    "OTEL_METRICS_EXPORTER": "console",
    "OTEL_METRIC_EXPORT_INTERVAL": 1000,
    "OTEL_METRICS_INCLUDE_SESSION_ID": false,
    "OTEL_RESOURCE_ATTRIBUTES": "user.name=testuser"
  }
}

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.64

Claude Code Version

2.0.67

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

iTerm2

Additional Information

We have a dashboard that monitors usage.
In the claude_code_active_time_seconds_total metric, the last version we are seeing is 2.0.64.