An explanation on what went wrong, how the Witnet development and node operators community successfully fixed it, and a wake-up call to prevent future episodes. — TL;DR: Hetzner shut down many of the Witnet nodes running on their cloud platform, which expelled many reputed nodes from the network, precluded broadcasting of superblock votes, and halted the Witnet chain. In the course of our investigations, we also found a now-fixed bug that made the recovery unnecessarily take…