Dear Maintainer,

What led up to the situation?
When launching Plasma Discover and switching to fullscreen mode, a thin
line or
gap appears at the bottom of the screen. This issue occurs only in
Discover –
other KDE applications like Dolphin, Firefox, and Konsole do not exhibit
this
behavior. The issue persists regardless of resolution or scaling settings.

What exactly did you do (or not do) that was effective (or ineffective)?
Restarted KWin (kwin_x11 --replace &) → Issue persists
Tried different scaling settings (100%, 125%, 150%) → No change
Tested both proprietary and open-source GPU drivers → Issue remains
Ran Discover with debug logging (QT_LOGGING_RULES="*=true"
plasma-discover) →
No relevant error messages

What was the outcome of this action?

The issue remained in all tests, indicating that it is not related to
graphics
drivers or display scaling.
The thin line is visible only in Discover, not in other KDE applications.

What outcome did you expect instead?

Plasma Discover should behave like other KDE applications in fullscreen
mode,
without any visible line or gap at the bottom.

System Information

Operating System: Debian GNU/Linux 12
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.103.0
Qt Version: 5.15.8
Kernel Version: 6.1.0-30-amd64 (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Xeon® E-2224G CPU @ 3.50GHz
Memory: 62.5 GiB of RAM
Graphics Processor: AMD Radeon RX 550 / 550 Series
Manufacturer: Dell Inc.
Product Name: PowerEdge T40
Scaling Settings Tested: 100%, 125%, 150% (Issue persists in all cases)

Steps to Reproduce

Open Plasma Discover
Switch to fullscreen mode (F11 or maximize the window)
A visible thin line or gap appears at the bottom of the screen

Expected Behavior

Plasma Discover should function like other KDE applications in
fullscreen mode,
without any visual anomalies at the bottom.

Screenshot for Reference

[Attach your screenshot or provide a link to the image]

Thank you for your support! 😊