Quoting alertmanager@hetzner-nbg1-02.torproject.org (2023-01-17 19:07:34)

Time: 2023-01-17 18:06:51.034543026 +0000 UTC Summary: Too many bridgestrap failures Description: The percent of functional bridges is 49.9%.

Looking at grafana bridgestrap had a period from yesterday 1400UTC to today 0800UTC that many bridge tests were failing. Now is recovering, currently is at 86% (normal is around 90%).

I have no idea what has happen. If it happens again I'll investigate.