LightDM deadlocks station after resume

After getting back from sleep or suspend, LightDM provides login screen with no controls to switch layout, change user or suspend/shutdown machine. And it doesn't accept right password. I guess because system was on different language layout at suspend time. But there is no layout indication either.

I had to hard reboot the PC. Can anybody at least explain what's going on?

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: lightdm 1.19.5-0ubuntu1
ProcVersionSignature: Ubuntu 4.8.0-26.28-generic 4.8.0
Uname: Linux 4.8.0-26-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.3-0ubuntu8
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Oct 22 09:55:16 2016
SourcePackage: lightdm
UpgradeStatus: Upgraded to yakkety on 2016-10-20 (2 days ago)