Synaptic doesn't close properly after exiting from "enter password" window

[netrick]

OS: Ubuntu 14.04 64 bit with Unity, fully updated

Reproducible: always

How to reproduce the bug:

1) Pin the "Synaptic package manager" to the Unity launcher
2) Click on the Synaptic icon
3) There will appear a window, which asks for your password
4) Close that window
5) The Synaptic icon on the Unity launcher will have pulsing light for 5-10 sec (this is the animation that Unity launcher uses when the app is launching) and you can't launch Synaptic by clicking on that icon during the pulsing light animation.

Expected behaviour:

5) The synaptic icon on the Unity launcher gets back to default state immediately and the icon acts as if the Synaptic was closed. So you can just click on the icon and launch Synaptic again.

Important: such issue with Synaptic doesn't happen with other DEs like LXDE or XFCE

I can provide more info if needed. This happens on every Ubuntu 14.04 setup I tested, so it seems it's unrelated to hardware and drivers.

[Launchpad Janitor (janitor)]

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

[Kumbarov (kumbarov)]

As part of the big bug review for 16.04 LTS I have tested this on 15.10 and the bug is still there.