MongoDB Atlas change history: Increase in Billing for Backup Usage

MongoDB Atlas reported a major billing-only bug causing higher-than-expected backup charges on April 24, 2026 invoices; backups, cluster health and data were unaffected. The incident ran from 2026-04-27 17:16 UTC to 2026-04-27 20:50 UTC (3 h 33 min). MongoDB resolved the issue, promised automatic refunds, and said usage should display correctly by April 28th.