Cornerstone experienced a notice incident on January 29, 2026 affecting Uptime and Response Time, lasting 1h 28m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jan 29, 2026, 06:26 PM UTC
We're seeing latency for some customers hosted on US PRD SL2. We are currently investigating this issue.
- monitoring Jan 29, 2026, 06:30 PM UTC
Latency has subsided, and system performance has returned to normal. We are continuing to monitor the service.
- monitoring Jan 29, 2026, 07:54 PM UTC
Performance and response times have remained stable.
- resolved Jan 29, 2026, 07:55 PM UTC
After a period of monitoring and no recurrence, this is considered resolved.
- postmortem Feb 12, 2026, 08:18 PM UTC
**Issue Summary:** On January 29, 2026, clients hosted in the US SL2 Production environment experienced service degradation that impacted overall platform responsiveness. During the affected period, users encountered slower response times and intermittent access issues across services dependent on shared backend components. **Root Cause:** The incident was caused by contention within a shared backend data service, which resulted in delayed request processing and reduced throughput. The degradation propagated to dependent application services, leading to broader performance impact. **Corrective Action:** Engineering teams identified and cleared the backend contention, restoring normal processing behavior. Affected services were monitored closely following remediation, and system performance stabilized shortly thereafter. **Preventive Measures:** To reduce the likelihood of recurrence, the following improvements were implemented: * Enhanced Backend Monitoring: Strengthened detection of contention and blocked processing conditions to enable earlier intervention. * Refined Alerting Thresholds: Adjusted monitoring thresholds to trigger faster response when abnormal backend behavior is detected. * Improved Operational Procedures: Strengthened operational procedures to improve resilience of dependent services.