Starter assigned to wrong application which has recently crashed

[UlfZibis]

- Have installed e.g. "Ace of Penguins" and have sticky starter symbol to "Penguin Solitaire" in Unity bar (created by drag 'n drop from Unity Dash).
- Run Thunderbird.
- Have a crash with Thunderbird (don't know how to force this intentionally).
- Fill the Thunderbird crash report with some info and select Restart.
- Klick starter symbol to "Penguin Solitaire" in Unity bar.
--> Nothing happens !
- Right-klick starter symbol to "Penguin Solitaire".
--> Note, that there is a Close menu, even no "Penguin Solitaire" instance is running.
- Choose Close.
--> Thunderbird closes instead.

[UlfZibis (ulf-zibis)]

Please note, I was not able to choose "Unity" as affected project, because when I tried to select it, I always got "Too many matches. Please try to narrow your search." Is this a known bug?
I'm not sure to which project to file such a bug.

[Andrea Azzarone (azzar1)]

Can you still reproduce this?

[UlfZibis (ulf-zibis)]

I don't know how to force a crash of Thunderbird with succeeding crash report intentionally, so I didn't manage to reproduce the problem so far.
Even if I would know how, I see some risk to damage my mail data.

[Launchpad Janitor (janitor)]

[Expired for unity (Ubuntu) because there has been no activity for 60 days.]

[UlfZibis (ulf-zibis)]

I currently see this bug again on my machine.
Can you provide some tasks to do to find out the cause of the problem. I can try to hold the state of my machine for some days, using the standby state instead rebooting it between usage times.