Upstash change history: Degraded Performance

Upstash reported critical degraded performance affecting regional and Redis Global components from 2025-06-11 06:51 UTC to 2025-06-11 10:02 UTC (3 h 10 min). OS maintenance updates changed networking components and triggered restarts, causing EC2 nodes to fail health checks and disrupting high availability; a fix was implemented at 06-11 09:20 UTC.