OpenWrt One crashed unexpectedly after 1 week of running

Hello all, my brand new Banana Pi OpenWrt One Router crashed unexpectedly after 1 week of running.

I did not do anything special with it: flashed the latest OpenWrt release 24.10.4, created SSIDs, installed tailscale, configured openwrt to route traffic to my home network and added one port forwarding rule (I can provide exact configs I applied over ssh later).

Suddenly the router stopped working, simple reboot did not help. The only thing helped was 15s reset button to go to failsafe mode.

Apparently this wiped all logs, so here is the question.

How do I diagnose what happened next time - what is the best way to save and extracr logs next time it happens?

Either Local Persistent Logging or Remote Logging [OpenWrt Wiki] Logging messages

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