Dear Maintainer,

resizing a floating window moves the window margins by double distance of the
mouse movement in the immediate feedback.
The resulting window will have the correct (expected) size, but the new part of
the window content is not correctly redrawn (see attachment after-resize.png)
A minimize/restore cycle makes the content correctly visible.

I'd expect the margin to be moved by the same distance as the mouse and the
content correctly shown after the resize is completed.

(xinerama configuration)