Weird choices in default application menus

[wout]

What Happened?

After installing Firefox (flatpak), it didn't appear to be selected as a web browser in the dropdown. Even after a reboot, that didn't change.

Now, it's also selectable (and selected by default) for other unrelated purposes:

Sames is true for Thunderbird (flatpak). It's not selectable as default mail client or calendar.

Steps to Reproduce

1. Install Firefox (or Thunderbird)
2. Try to assign is as a default app
3. Does not appear in the menu

Expected Behavior

Both applications should appear in the menus.

OS Version

8.x (Early Access)

Session Type

Classic Session (X11, This is the default)

Software Version

Latest release (I have run all updates)

Log Output

No response

Hardware Info

         eeeeeeeeeeeeeeeee             wout@Framey
      eeeeeeeeeeeeeeeeeeeeeee          -----------
    eeeee  eeeeeeeeeeee   eeeee        OS: elementary OS circe 8 x86_64
  eeee   eeeee       eee     eeee      Host: Laptop (12th Gen Intel Core) (A8)
 eeee   eeee          eee     eeee     Kernel: Linux 6.8.0-48-generic
eee    eee            eee       eee    Uptime: 12 hours, 25 mins
eee   eee            eee        eee    Packages: 1812 (dpkg), 18 (flatpak-system), 18 (flatpak-user), 7 (sn)
ee    eee           eeee       eeee    Shell: bash 5.2.21
ee    eee         eeeee      eeeeee    Display (BOE095F): 3000x2000 @ 60 Hz in 13" [Built-in]
ee    eee       eeeee      eeeee ee    DE: Pantheon
eee   eeee   eeeeee      eeeee  eee    WM: Mutter(Gala) (X11)
eee    eeeeeeeeee     eeeeee    eee    Theme: Yaru [GTK3], io.elementary.stylesheet.blueberry [GTK4]
 eeeeeeeeeeeeeeeeeeeeeeee    eeeee     Icons: Yaru [GTK3], elementary [GTK4]
  eeeeeeee eeeeeeeeeeee      eeee      Font: Inter (9pt) [GTK4]
    eeeee                 eeeee        Cursor: elementary
      eeeeeee         eeeeeee          Terminal: x-terminal-emulator
         eeeeeeeeeeeeeeeee             CPU: 12th Gen Intel(R) Core(TM) i7-1280P (20) @ 4.80 GHz
                                       GPU: Intel Iris Xe Graphics @ 1.45 GHz [Integrated]
                                       Memory: 7.55 GiB / 62.51 GiB (12%)
                                       Swap: 0 B / 3.80 GiB (0%)
                                       Disk (/): 70.56 GiB / 910.86 GiB (8%) - ext4
                                       Disk (/media/wout/1TB Framework): 168.41 GiB / 913.59 GiB (18%) - ex4
                                       Local IP (wlp166s0): 192.168.1.253/24
                                       Battery (Framewo): 85% (2 hours, 44 mins remaining) [Discharging]
                                       Locale: en_US.UTF-8

[wout]

Today, after a few reboots, Thunderbird appeared in the Email Client dropdown:

But Firefox is also still there as an option.

[decembre-dhiver]

Yes, me too, I have the same issue. However I still cannot see Firefox as an option for Web Browser, there's only Gnome's Web available right now. And the same happens to the music player - I cannot choose Amberol, it isn't listed

(all updates are installed, eOS 8 release version, secure session)