pixi container hitarea with mask

I create a container then add some points to it , and create a mask on the container, make the container moveable , outside the container , there are some displayObject which are clickable ;

but when I move the container, the displayObject is masked by the container , it is not clickable;

what is worse, the point is invisible but clickable outside the mask , seems mask only make it opacity:0 , It's not correct !

here see more visible

http://ift.tt/2DfKckQ