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SUMMARY
When Discover update system tray icon shows up and user clicks on it, the update view shows "Up to date"

When Discover is opened from desktop file instead, it shows the available System upgrades.

Flatpak application updates do show up though.

STEPS TO REPRODUCE
0. Need to have updates available, this can be done by downgrading one of the applications you have installed (i downgraded audacious with `sudo dnf downgrade audacious`). Then make sure Discover notices you have an update available.
1. Click discover status notifier icon to open discover, updates say theres nothing available
2. Close discover
3. Open it from anywhere else (desktop file, pinned discover app in task manager), it shows the available updates

OBSERVED RESULT
System upgrade field does not show up but only when Discover is opened from system tray

EXPECTED RESULT
System upgrade field would show up no matter where the app is opened

SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.80
KDE Frameworks Version: 6.5.0
Qt Version: 6.7.2
Kernel Version: 6.9.8-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 15.5 GiB of RAM
Graphics Processor: AMD Radeon RX 6600
ADDITIONAL INFORMATION