PostHog EU Outage History

PostHog EU experienced an issue where certain workflow templates (including PostHog actions and email templates) failed to load due to a security/permissions restriction that incorrectly filtered out template types. This prevented users from inspecting existing workflows or creating new ones using the affected templates, though active workflows continued running normally. The issue was identified and fixed within 2.2 hours, with the resolution awaiting rollout verification.

PostHog EU experienced failures in creating cloud tasks, affecting PostHog Code functionality and Slack bot operations. The incident was classified as minor and lasted 30 minutes. The service was investigating the cloud task creation failures during this period.

PostHog EU experienced an OAuth authorization issue that caused Wizard runs to fail for approximately 4 hours. The service team implemented a fix and validated the resolution within 18 minutes of formal incident declaration. Users may have experienced failed Wizard run executions during the affected period.

PostHog EU experienced event ingestion processing delays caused by a problematic migration, preventing events from appearing in the product and queries in a timely manner. The issue was identified and mitigated within approximately 1.5 hours, though users may have seen duplicate events during recovery. Full recovery took an estimated 2 additional hours after mitigation, with no data loss occurring during the incident.

PostHog EU experienced a partial outage affecting PostHog AI and other Temporal-based services, causing users to encounter errors when loading specific pages or performing certain actions. The incident lasted 1.1 hours and was classified as a minor outage. The issue was identified and resolved with the service returning to normal operation after monitoring confirmed stability.

PostHog EU experienced email delivery issues for 2.9 hours due to problems with their Mailgun account. The incident affected email sending and receiving, as well as support-related email functionality within their Support product. The team identified the root cause and worked directly with Mailgun to resolve the issue and restore normal email operations.

PostHog EU experienced a 6.2-hour service disruption due to unplanned maintenance following a confirmed security exploit in their AWS environment. The incident affected the main app and caused impacts to exports, reverse proxies, and other services while security keys were rotated as a precautionary measure. No data was compromised and no keys were publicly exposed during the incident.

PostHog EU experienced failures affecting system table queries and MCP (Management Control Plane) usage for 2.3 hours. The engineering team identified the root cause and deployed an infrastructure change to resolve the issue. The fix has been successfully deployed and the service is now operational.

PostHog EU experienced a complete failure of email delivery across all third-party email providers for 1.2 hours. Customers experienced delays in receiving authentication, transactional, and promotional emails during this period. The service was restored and email delivery returned to normal, with the team monitoring the situation to ensure stability.

PostHog EU's MCP service experienced connection failures that prevented coding agents and IDEs (including Cursor, Claude, VS Code) from connecting properly. The incident lasted 18 minutes before the team identified the cause and resolved it by rolling back to a stable release. The team is now investigating how to fix the problematic update to prevent future occurrences.