Census change history: Sync might be failing with mismatch errors

Census reported a major Sync Engine incident where some syncs failed with mismatch errors, starting 2025-04-04 22:40 UTC and resolved 2025-04-05 16:23 UTC (17 h 42 min). Census attributed failures to a performance issue, said errors could appear after the problem was resolved, and advised customers to rerun affected syncs.