Bug 502182

SUMMARY
When Konsole (KDE Terminal) being shaded (hiding the content of the window but left the title bar alone), it still leaves the blurry background rectangle intact, while other app (that has native KDE title bar/frame and can be shaded) doesn't leave anything

SETTINGS
> Desktop Effects
>> Appearance
- Background Contrast: Disabled
- Blur: Enabled
-- Blur strength: level 11/15 (index 10)
-- Noise strength: level 01/15 (index 0)
- Desaturate Unresponsive Applications: Enabled
- Fading Popups: Enabled
- Fall Apart: Disabled
- Full Screen: Enabled
- Highlight Screen Edges and Hot Corners: Enabled
- Login: Enabled
-- Fade to black: Disabled
- Logout: Enabled
- Maximize: Enabled
- Mouse Mark: Disabled
- Sheet: Disabled
- Sliding Popups: Enabled
- Thumbnail Aside, Touch Points, Translucency, Wobbly Windows: Disabled
- Minimize Animation: Squash
>> KWin Scripts
- All Disabled
>> Konsole Profile Appearance
STEPS TO REPRODUCE
- Blur background: Enabled
- Background color transparency: 20%
>> Colors & Themes
- Global Theme: Breeze Dark
- Application Style: Breeze
- Plasma Style: Breeze
- Window Decorations: Breeze

1. Open Konsole
2. Right-Click the Title Bar -> More Actions -> Shade
3. Try to move the Title Bar around

now do the same with other app, such as Kate

1. Open Kate
2. Right-Click the Title Bar -> More Actions -> Shade
3. Try to move the Title Bar around

OBSERVED RESULT
Konsole leave a "masked" blur rectangle background where the content supposed to be, and it seems to be "Click through" and  sort of "non corporeal", and if you move the title bar, it looks like it moves the "mask" around but not the blur itself, which means the blur area can be "cut off" but "non destructively" as in if you move the title bar back to the original place, the blur still encompass the entire window content rectangle

While Kate, doesn't leave anything behind where the window content supposed to be

EXPECTED RESULT
The "blur" part should be hidden when being shaded and then come back when unshaded like what happened with Kate.

SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux
KDE Plasma Version: 6.3.2
KDE Frameworks Version: 6.11.0
Qt Version: 6.8.2
Kernel Version: 6.13.5-2-MANJARO (64-bit)
Graphics Platform: X11
Processors: 4 × Intel® Core™ i3-8100 CPU @ 3.60GHz
Memory: 31.1 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 2060