Maximized windows move to the first monitor after wakeup

After wakeup, maximized windows always move to the first monitor ("LVDS connected" here).
Unity panel is on second monitor ("VGA-0 connected primary").

$ xrandr
Screen 0: minimum 320 x 200, current 3286 x 1080, maximum 8192 x 8192
VGA-0 connected primary 1920x1080+1366+0 (normal left inverted right x axis y axis) 531mm x 298mm
   1920x1080 60.0*+
   1680x1050 60.0
   1600x900 60.0
   1280x1024 75.0 60.0
   1280x800 59.8
   1152x864 75.0
   1280x720 60.0
   1024x768 75.1 60.0
   832x624 74.6
   800x600 75.0 60.3
   640x480 75.0 60.0
   720x400 70.1
LVDS connected 1366x768+0+312 (normal left inverted right x axis y axis) 309mm x 174mm
   1366x768 60.0*+ 50.0
   1280x720 59.9
   1152x768 59.8
   1024x768 59.9
   800x600 59.9
   848x480 59.7
   720x480 59.7
   640x480 59.4
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.0+14.04.20140423-0ubuntu1.2
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Wed May 7 11:16:31 2014
InstallationDate: Installed on 2013-10-23 (195 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2014-04-18 (18 days ago)