Created attachment 176995 [details]
Bug as it appears at startup. Entering edit mode will unfold icons.

SUMMARY

On a dual-monitor setup, icons in the dock may not unfold or display properly upon startup. However, entering "Edit Mode" fixes the issue temporarily.

STEPS TO REPRODUCE

1. Set up a dual-monitor configuration.
2. Create an Icons Only taskbar on both monitors.
3. Configure both taskbars with the settings detailed below
4. Restart the system.
5. Observe the dock icons on both monitors.
6. Restart again if dock unfolds successfully, issue does not occur on every startup and may require a few attempts. 

OBSERVED RESULT

The dock icons remain collapsed or fail to display properly at startup. Entering Edit Mode causes the icons to unfold correctly.

EXPECTED RESULT

The dock icons should display properly without requiring manual intervention after startup.

SOFTWARE/OS VERSIONS

Operating System: Fedora Linux 41
KDE Plasma Version: 6.2.4
KDE Frameworks Version: 6.9.0
Qt Version: 6.8.1
Kernel Version: 6.12.6-200.fc41.x86_64 (64-bit)
Graphics Platform: Wayland
WM Theme: Orchis-dark
Dock Icons: Tela-circle-dark (Qt/GTK)

TASKBAR SPECIFICATIONS

Set Position: Bottom
Alignment: Centre
Width: Fit content
Visibility: Dodge Windows
Opacity: Translucent
Style: Floating
Panel Height: 54
Focus Shortcut: None

ADDITIONAL INFORMATION

Attached screenshot demonstrates the issue as seen after startup.
When the taskbar does unfold, the animation is still very choppy.
Issue seems to be related to specific taskbar specifications. Setting both taskbars up as permenantly visible, non floating and filling the width seems to improve the issue, though the unfolding animation is still choppy. 
The issue does not occur on every startup. Sometimes it affects both monitors, one monitor, or neither.
The issue is not related to theme, I have recreated the issue using different icons and themes.
The issue has been reproduced on both my laptop and desktop, both running similar set ups. 
Have not recreated the issue on a single monitor set up. 

SYSTEM SPECIFICATIONS

Host: Inspiron 14 7435 2-in-1 (1.13.0)
Display (Monitor 1): DELL P1244H @ 1920x1080, 60Hz (External)
Display (Monitor 2): BOE0A2A @ 1920x1200, 60Hz (Built-in)
CPU: AMD Ryzen 7 7730U with Radeon Graphics (16 Cores, 4.55GHz)
GPU: AMD Barcelo [Integrated]
Memory: 14.9 GiB of RAM
Disk: 49.8 GiB used of 967 GiB (btrfs)