Over a window of several hours the primary node ran longer anti-DDoS queue times than usual under a coordinated flood. Queue waits stretched past a minute on some circuits where they normally clear in seconds.
The market was never down. The secondary and reserve nodes stayed responsive throughout, which is the entire reason Osiris runs a deep pool and the reason it is the market people rotate to during DDoS season. Readers who switched to a fallback continued without interruption.
The explorer's guidance during a flood does not change. Do not sit on a slow node hoping it recovers. Rotate to the next node, verify it, and continue. A flood raises queue times, it does not compromise the addresses, and verification protects you either way.
The window closed on its own as the flood subsided. No rotation was needed and no node was retired.