Thunderbird still running after being closed

[Martin Vysny]

The "number of windows" indicator in the Ubuntu Dash (the orange dots to the left of the app icon) is not cleared for Thunderbird, when a new e-mail is written in a new window. Ultimately, the indicators stay visible even after Thunderbird is closed completely, and it's no longer possible to launch thunderbird by left-clicking of the dash icon (middle-click works okay).

Steps to reproduce:
1. Launch Thunderbird. There is one orange dot to the left of the thunderbird icon.
2. Write an e-mail and close the e-mail window
3. Observe that there are now two orange dots to the left of the thunderbird icon.

Please see the screenshot for more details.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: gnome-shell 3.38.4-1ubuntu3~21.04.1
ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22
Uname: Linux 5.11.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Mon Aug 2 11:41:47 2021
DisplayManager: gdm3
InstallationDate: Installed on 2021-03-24 (130 days ago)
InstallationMedia: Ubuntu 20.10 "Groovy Gorilla" - Release amd64 (20201022)
RelatedPackageVersions: mutter-common 3.38.4-1ubuntu2
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to hirsute on 2021-04-23 (101 days ago)

[Daniel van Vugt (vanvugt)]

The leftover dots and the inability to relaunch Thunderbird both mean it's still running in the background. So that's a Thunderbird bug. I experience similar problems with Thunderbird often.

[Martin Vysny (vyzivus)]

Thank you for getting back to me. I'm convinced that Thunderbird is actually not running, since `killall thunderbird` said that there's no such process, and `ps -ef|grep -i thunderbird` has shown no thunderbird process running.

However, after a reboot, I am not able to reproduce this issue easily. I'll try to find a more solid steps to reproduce, then I'll post more information.

[Martin Vysny (vyzivus)]

I was able to reproduce the issue - please see the screenshot for more details. Unfortunately I don't have concrete steps to reproduce - I was simply writing a long e-mail and after I sent it, I realized the thunderbird/dash issue reproduced.

[Yves Roggeman (yrogge)]

Same problem as bug #1932328

[Launchpad Janitor (janitor)]

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