Can't properly pin Firefox Beta to the Panel

[Solarunit]

Description

Can't properly pin Firefox Beta to the Panel

Budgie version

budgie-desktop 10.5.1

Operating system

Solus 4.1

Steps to reproduce the issue

1. Pin Firefox beta to the panel
2. Launch Firefox beta

Actual result

Firefox beta is opening, but the icon keeps blinking ~ 10 sec. When you try to click on this icon again I get this warning:

Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

Expected result

Same as Firefox stable

Additional information

[ghost]

Well, the taskbar creates a new instance of firefox. Maybe that's the problem? I dunno.

[Solarunit]

That was Firefox from Mozilla site. There is also issue with Firefox Flatpak version. About that @JoshStrobl commented on forum:

If you have both flatpak firefox and system firefox, then yea I imagine the DesktopAppInfo is using the system-wide source first, >and pinning + launching that. Not really sure of a good way to address that, or honestly if I even should. There's just a time ?>cost v.s. reward and I can't expect that most people are going to be installing the same app from multiple sources.