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Update based on our September 19, 2026, 04:15 UTC log check:
Intermittent HTTP 522 errors subsided around 01:03 UTC on September 19. At the time of that check, no further 522 errors had been reported for over three hours, and recent connection logs showed traffic completing from the previously affected Cloudflare IPs.
The errors caused retries, delayed builds, or failed cache downloads. Our investigation focused on connectivity between Cloudflare and our infrastructure in Northern Virginia, eastern United States. The suspect Cloudflare source IPs geolocate to Ashburn, Virginia, but their physical location and the full geographic scope remain unconfirmed. Customers outside this region may also have been affected.
The incident is in monitoring. The root cause remains unconfirmed. We will share further updates here.