Hittest true after mouse exits stage

i have a hit test point on display object, and if i exit stage over that display object, and then run hit test point it will return true, although my mouse is not over stage area any more, like it remembers the last mousex, mousey coordinates where mouse was and reports that.

how do i deal with it?

i know i can detect mouse_leave on stage and mouse_out on displayobject.

i mean how can i ask if mouse is over stage?