Upstash change history: Performance degradation on QStash

QStash had a major incident affecting EU-CENTRAL-1, with extremely high event-processing latency for all users and duplicate deliveries for some customers. It ran from 2024-11-13 14:14 UTC to 2024-11-13 17:27 UTC, lasting 3 h 12 min. Upstash attributed the degradation to sudden, extreme server load and reported implementing a fix before resolution.