Bug 498875

SUMMARY
I have two instances of Brave Browser installed on my system: the flatpak version from Discover, and the non-flatpak version from the repo via dnf.

(yes I have a legit reason for wanting to do this)

Both have completely separate configurations and use cases, and both are pinned in my Icons-Only Task Manager. Both do seem to run independently with no issue.

However, when I click on the icon in the Task Manager to launch the dnf version, the icon for the flatpak version is the one that lights up (the dnf version still opens as expected with its unique configuration, synced tabs, etc).

When I click the icon to launch the flakpak version, the icon lights up and the Flatpak version opens with its own unique setup as expected.

So these apps do operate independently, but instances of either app only show up under the flatpak version icon.

Clicking the icon to launch the dnf version makes the system think that the flatpak version is what's running, even though the flatpak version can then be launched independently with a middle click.

However, middle-clicking each app's respective icon launches the appropriate additional instance. So even when the dnf version is running, and the flatpak icon is highlighted, middle-clicking the flatpak version icon still launches a new instance of the flatpak version.

Have I explained this in a way that makes any sense whatsoever?

STEPS TO REPRODUCE
1. Install Brave browser flatpak via discover, AND install Brave browser via dnf from Brave's repo
2. Change the icon of one of the two instances so you can tell them apart, and pin them both to the Icons Only Task Manager on a panel
3. Reboot
4. Click the Brave (dnf version) icon in the Task Manager. The icon for the flatpak version will be the one that highlights
5. While the dnf version is still running, middle click the flatpak icon (which should now be highlighted). The flatpak version will now launch.
6. With both closed again, click the flatpak version icon. Flatpak version launches as expected.

OBSERVED RESULT
Dnf version and flatpak version both launch their instances under the flatpak version's icon, even though middle clicking respective icons still launches respective new instances properly.

EXPECTED RESULT
Dnf version should launch under its own icon.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 41
KDE Plasma Version: 6.2.5
KDE Frameworks Version: 6.10.0
Qt Version: 6.8.1

ADDITIONAL INFORMATION