SUMMARY
After changing the scaling on the primary monitor, sometimes it stops showing the applications that are on that screen in the task manager. I cannot reproduce it consistently.

STEPS TO REPRODUCE
1. On a dual monitor setup, enable 'Show only tasks: From current screen' on both taskbars. 
2. Launch a couple of applications on the primary monitor.
3. Change scaling (and position) through the terminal with `kscreen-doctor output.DP-1.scale.1,00` and `kscreen-doctor output.DP-1.position.1080,300`.

OBSERVED RESULT
The applications on the primary monitor stop showing in the task manager.

EXPECTED RESULT
Show the applications that are on that screen in the task manager.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora Linux 42
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0 
Qt Version: 6.9.0

ADDITIONAL INFORMATION
- I do this very often otherwise games will have the wrong resolution. The primary monitor must be set to 100% scaling and use `Legacy applications (X11): Scaled by the system' prior to launching any game.
- This bug goes away if I change the Icons-and-Text Task Manager to Icons-Only task manager (it stays fixed even after changing it back to Icons-and-Text Task Manager).
- Changing the scaling back to the prior value makes the applications show in the task manager again.


output of `kscreen-doctor -o`:

Output: 1 DP-1
        enabled
        connected
        priority 1
        DisplayPort
        Modes:  1:2560x1440@144!  2:2560x1440@120*  3:2560x1440@100  4:2560x1440@60  5:1920x1200@144  6:1920x1080@75  7:1920x1080@60  8:1920x1080@60  9:1920x1080@60  10:1920x1080@50  11:1600x1200@144  12:1680x1050@60  13:1600x900@60  14:1280x1024@75  15:1280x1024@60  16:1440x900@144  17:1280x800@60  18:1152x864@60  19:1280x720@60  20:1280x720@60  21:1280x720@50  22:1024x768@75  23:1024x768@60  24:800x600@75  25:800x600@60  26:720x480@60  27:720x480@60  28:640x480@75  29:640x480@60  30:640x480@60  31:1600x1200@60  32:1280x1024@60  33:1024x768@60  34:1920x1200@60  35:2560x1440@60  36:1920x1080@60  37:1600x900@60  38:1368x768@60  39:1280x720@60 
        Geometry: 1080,440 2048x1152
        Scale: 1.25
        Rotation: 1
        Overscan: 0
        Vrr: Never
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 50% and dimming to 100%
Output: 2 DP-2
        enabled
        connected
        priority 2
        DisplayPort
        Modes:  40:3840x2160@60*!  41:3840x2160@30  42:2560x1440@60  43:1920x1200@60  44:1920x1080@60  45:1920x1080@60  46:1600x1200@60  47:1680x1050@60  48:1600x900@60  49:1280x1024@60  50:1440x900@60  51:1280x800@60  52:1152x864@60  53:1280x720@60  54:1280x720@60  55:1024x768@60  56:800x600@60  57:720x480@60  58:720x480@60  59:640x480@60  60:640x480@60  61:1600x1200@60  62:1280x1024@60  63:1024x768@60  64:2560x1600@60  65:1920x1200@60  66:3200x1800@60  67:2880x1620@60  68:2560x1440@60  69:1920x1080@60  70:1600x900@60  71:1368x768@60  72:1280x720@60 
        Geometry: 0,0 1080x1920
        Scale: 2
        Rotation: 2
        Overscan: 0
        Vrr: incapable
        RgbRange: unknown
        HDR: incapable
        Wide Color Gamut: incapable
        ICC profile: none
        Color profile source: sRGB
        Color power preference: prefer efficiency and performance
        Brightness control: supported, set to 50% and dimming to 100%