Disable screen preview in the task manager?

[winnivin]

Disable screen preview in the task manager

Hi,

I own a Moto G3 which is the best phone phone I've ever had. No problems except for the one I'm about to tell you about.

This is with App Locking software's and I've encountered it with AppLocker and CM Secuirty.

What happens is when I launch an app that is locked it prompts for the code/pattern but if the task manager/recent screens(clicking on the icon at the lower right) is clicked the screen of the app is shown. How do I disable this?

This image should help you visualize my problem, hXXp://cdn.ghacks.net/wp-content/uploads/2013/01/android-task-manager.jpg
I don't want the screens to show up there. Or say make those screens blank.

Thanks!