Comment 3 for bug 1291088

I was going to make a new report, but I am almost positive that this is the same issue but with a different trigger.

My computer is only a single user, but sometimes when I unlock the screen from being inactive, a new lock screen pops up seconds after unlocking.

Procedure:
Since I upgraded to the developer version I have had this issue several times. I leave the computer unattended overnight. The power settings are not configured to allow the computer to go to sleep. When I come back, I log into the lock screen and it unlocks. I can interact with the desktop for a few seconds before the screen turns black for a few second and a lock screen pops up again. Shorter durations of inactivity-triggered "locked" time do not seem to replicate this behavior.

I do not really know where to look to gather more information.