When we close any hidden app,it still remains in recent app,so it must not be in recent app.We hide something because we don't want others to see that,so after closing hidden app,it should permanently close and we have to open that again if we want to open that again.
Or there can be an option of time of disappearance of hidden app.
One last thing,there must not be the option of "View Hidden apps" in app drawer section,by this option anyone can see that we are hiding something,then what will be the meaning of hiding something if other person know it.
Make these happen please.