Update
6.10.2, same problem. New syslog and diagnostics.
Coming from v6.10.0-rc8 to v6.10.1, unfortunately system shuts down without a warning after random hours.
RAM is tested nothing wrong.
No problem in v6.9.2.
I tested new install on a new USB, v6.9.2 no problems, v6.10.1 system shuts down without a warning after random hours.
Syslog server is enabled to USB but unfortunately no information about the shutdown.
Help is greatly appreciated!