CDN Cache Warming Did Not Improve Hit Ratio? Check Warmed Objects, Cache Keys, and Origin Fill Why Does the CDN Cache Only Some Responses? Check Cache-Control, Set-Cookie, and Dynamic Content Rules CDN Compression Makes Responses Larger or Corrupt? Check Content-Encoding, Cache Variants, and Double Compression Different CDN Edges Serve Different Content? Check Cache Keys, Deployments, and Tiered Caching Origin Traffic Spiked but CDN Cache Hit Ratio Stayed High? Check Cache Tiers, Duplicate Fetches, and Metric Scope Origin Down but the CDN Hasn't Failed Over? Check Health Probes, Failover Rules, and Cached Responses Dynamic Pages Cached After Adding .css? Troubleshoot Web Cache Deception and Path Rule Mismatches Duplicate Orders After an API Timeout? Check CDN Origin Retries, Client Resends, and Idempotency Some Users Get 431 or 400 Behind a CDN? Troubleshoot Cookie Bloat and Request Header Limits Signed Download URL Returns 403 Before Expiry? Check Temporary Credentials, Clock Skew, and CDN Query Changes