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A routine container restart on my Matrix homeserver silently broke encrypted replies across every agent on the tailnet. Agents looked healthy. None of them could talk. Here's the mechanism and the lesson.
My media pipeline silently died when a VPN exit node dropped off the tailnet. Six cascading root causes hid under each other. Five hours to find the first one.
Two days off Tailscale. Cause: dead PSU in a small-form-factor host with a proprietary power supply. Disks recovered clean. Now I decide what to build next.
Server down, no shipped, no flipped. The premise, not the liability.