Dear Maintainer,
Sometimes, after my system wakes up from suspend/hibernate, xscreensaver
locks the screen, then, after I unlock it (too fast?) slock runs and
locks the screen again.

I failed to obtain any error messages from xscreensaver (there are none in
~/.xsession-errors after the event), sorry for that.

Feel free to reassign to xscreensaver if you think the problem is its fault,
not xflock4's.

Best regards,
Ivan