Description:

When using a custom panel without Task Manager, in "Windows can cover" mode (Dodge Windows), the panel fails to hide after interacting with certain widgets.

It stays visible even if a window overlaps it, until I manually restart plasmashell or open/close the System Tray. This happens consistently after using widgets such as "Show Desktop" or other custom applets.

Steps to reproduce:

Create a custom panel with only widgets (no Task Manager).

Set panel visibility to "Windows can cover".

Open a maximized window.

Interact with a widget on the panel (e.g., Show Desktop, System Tray).

Move the maximized window so it should cover the panel.

Expected behavior:
The panel should hide/avoid windows as configured.

Actual behavior:
The panel stays visible and does not dodge/hide until reopening the system tray or restarting plasmashell.

Workaround:
Opening and closing the System Tray restores the correct hiding until the next widget interaction.

System Information:

OS: EndeavourOS (64-bit)

KDE Plasma: 6.4.4

KDE Frameworks: 6.16.0

Qt Version: 6.9.1

Kernel: Linux 6.15.9-zen1-1-zen (Wayland)

CPU: AMD Ryzen 9 5900X (24) @ 4.95 GHz

GPU: AMD Radeon RX 6800

RAM: 32 GiB

Additional notes:
I am not using the "Unhide when a window wants attention" option, because the panel has no Task Manager.
The issue seems related to widget interaction breaking the "Windows can cover" behavior.