I'm currently running the jan31 build of CM and have had the Sleep of Death with every build of this ROM, especially reproducable when the phone has been on the charger for several hours. It justs sits there, the notification LED works, but it can’t be waked up. I have to press the power button for 15 or so seconds to forcibly reboot the device.
Even the "Wake my Android Pro" app on default values (wake up every 29 minutes) wasn’t able to fix this. I can fully prevent the SoD using the "Wake Lock" app and setting PARTAL_WAKE_LOCK, however this drains the battery massively.
I have done a full wipe before switching from stock to CM and did another full wipe before going to the jan31 build, however the problem persists.
Nobody else in the main thread seems to be affected by this problem.
This is on a German Moto G XT1032.