OS 10.1: all apps closed/quit after sleep

Joon wrote on :

if I leave apps open and go away, they're all closed when I wake the system up, and stuff isn't saved, as if they were all force-quit. doesn't matter if they're Classic or X apps. all I have on in Energy Saver is to turn off the monitor after 10 minutes. the rest is set to never sleep.

could it be the OS X Seti@redacted.invalid thing? the GUI not the command-line version. it's set to kick in after 10 minutes.