QT bug forcing to minimize window...

So lets say our screen resolution is 1920×1080…
In our mainwindow we have a listwidget with a minumum width to 800, and a label with a minimum of 500 width.. label and listwidget layouted horizontally… that makes us a minimum of 1300 window.. So we cant resize the window to the half of the screen.. and that’s ok..

BUT.. Ubuntu has a shortcut to resize the window exactly to the half of the screen… and see what happens:

The first time u hit Windows key+ctrl+left arrow it resizes it to the window’s minimum.. which is ok!
the second time it forces it to go and fit the half screen…

Video previewing it: http://www.youtube.com/watch?v=cRmtR0QHIl8