Virtual mouse object always move up-left when grab mouse is set to false

[KvaGram]

I'm just starting out with using your engine. My game project is very UI heavy, and require a cursor, so I had a cursor icon added, and disabled the mouse-grab, since there is no need to contain my cursor.

This is how I came over an issue.
When moving my mouse into the game-window, the virtual cursor updates as expected. When moving the mouse in the window, the cursor moves up-left at every update.
This also applied to pressing and releasing mouse-buttons.

The fault seems to lie in mouse.java more specifically in private void setLocation(final MouseEvent e).
Looking at commit-history, it seems this has been an issue for quite a while.

Setting grab mouse to true results in a normal behavior, but the cursor is caged in the window.
This is a workaround, but I want my cursor to be free the leave the game window if it so wants to.
Please fix.