Any way to find out what triggered a random reboot?

I had my first random reboot of HA today- No idea what caused it. Power supply, SD card could be culprits but given it’s been running fine for months…
any ideas?

A WiFi router which runs off the same power strip did NOT reboot at the same time so I figure it’s unlikely to be a wider electricity related root cause?

I’m also having this issue. Are you using mqtt?

Ever since I upgraded to 0.86.0 my Hassio system has been rebooting daily. Unfortunately I’m away at the moment so can’t investigate but I’d really like to know what is causing it!

Yes, I am.