Lock screen password field doesn't intercept key pressings from keyboard

[Yanpas]

How do I get it
1) Open google.com in private window of google-chrome
2) Start entering something in text field
3) Click Lock option and type anything on the keyboard - password field would be empty
4) Switch layout 2 times - and enter your pw
5) That key compinations which you were entering on lock screen are entered in chrome

Trusty prposed, PS\2 keyboard.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity-greeter 14.04.10-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Jul 24 23:57:18 2014
InstallationDate: Installed on 2014-01-14 (191 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: unity-greeter
UpgradeStatus: Upgraded to trusty on 2014-04-18 (97 days ago)