Same issue here
I have already...
1. ...activated lock after 5 minutes
2. ...assigned the unlock password
3. ...selected the lock screen theme with QtLockscreen configuration
3.1 I selected Iphone (with MP)

But then after 5 minutes, what i got it's the lock screen asking me for my unlock password, then i enter it and then it goes directly to the desktop.

how can i then go to that nice screen with the slide control to unlock?