This, of course, results in a very excessive power consumption

Unfortunately, the wakelock(s) which seems to cause this behavior, are displayed as *overflow* and thus cannot be connected to any particular flow.
What can I do to prevent this? If this power drain is not noticed early it empties the battery completely in just a few hours!
And the only way to end this power drain is to reboot the phone...

Nexus 5, Android 4.4.4 KitKat, root