In Windows 8.1, after turning on active windows tracking (Focus only) by registry tweak, whenever mouse cursor hovers on the start button the focus gets locked onto the start button. To bring focus back onto something else left/right-click/alt+tab is required.

Is it possible to avoid this with active windows tracking on?
I mean, can the mouse hover on start button, get the focus on the start button and moving the mouse to other window will get the focus on the windows without clicking/alt+tab?