Please remove "Lock screen before sleep" setting in session settings
Power manager uses the same setting. It should be power manager's setting, and it can be changed in
It is better that user can choose each time whether to use lock or not, when he/she suspends manually.
I am used to disabling this setting and use launcher for
xflock4 && xfce4-session-logout --suspend that I use when I want to lock in conjunction with sleep. That also works better than suspending by e.g. Action Buttons due to bugs like #15. and #108.
Unfortunately, if I disable the setting in session settings, I do not have an option to lock when power manager puts system to sleep (besides power manager has similar issues xfce4-power-manager#5 and xfce4-power-manager#127).