OpenTelemetry span context loss during real-time queue stats polling

span context drops when polling /api/v2/analytics/queues/realtime.

const span = tracer.startSpan('queue-stats');
const headers = propagation.inject(span);
const res = await axios.get('/api/v2/analytics/queues/realtime', { headers });

waitingCount and availableAgents are correct, but the child span in Jaeger lacks the parent traceId. Is the Statistics API stripping headers? How do I force context injection for this specific endpoint?