Empty-blank space when dragging icon to panel

[DeadMetaler]

Ubuntu 15.04 Vivid
When dragging icon to panel it's become blank icon
It's also happened in 14.04 LTS in unity (backport) from proposed repo.

See this video
https://www.youtube.com/watch?v=5mdWKA-vReU

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: unity 7.3.2+15.04.20150410.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-14.14-generic 3.19.3
Uname: Linux 3.19.0-14-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.17.1-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Thu Apr 16 11:42:47 2015
InstallationDate: Installed on 2015-04-12 (3 days ago)
InstallationMedia:

SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alex Baggott (alex-baggott)]

I'm unable to reproduce this bug in 15.10, tempting me to suggest it's been fixed, but, on the other hand, I've never noticed it in 14.04.

[DeadMetaler (dead-666)]

16.10 and issue still present. But now i don't now about 14.04.

[DeadMetaler (dead-666)]

*16.04
my mistake