Still
aligned
bottom-right
???

Testcase description

The yellow square is positioned with

<div style='position:absolute;
    right:0px;bottom:0px;
    width:150px;height:150px;
    background:yellow'>

It should always be aligned right-bottom, applied to the browser window.

How to reproduce

Note: if you also change window width, the problem does not occour. The box is also repositioned if the scrollbar gets hidden or shown (which changes the innerWidth).