WorkOS change history: Form POST failures for some Authkit customers

WorkOS reported a major AuthKit incident affecting form POSTs for roughly 2% of organizations using hosted Authkit custom domains, disrupting sign-in. It started at 2026-09-09 21:00 UTC and was resolved at 2026-09-09 23:02 UTC (reported duration: 2 h 1 min). WorkOS reverted the configuration change responsible and later reported shipping lasting fixes.