Can't rearrange icons in 'Grouped window list' applet when it is in top panel

Distribution

Mint 22

Package version

6.2.9

Graphics hardware in use

No response

Frequency

Always

Bug description

When the Grouped window list applet is on a top panel, the app icons cannot be rearranged although the Enable app button dragging option is on.

Steps to reproduce

1. Add a panel at the top of the screen or move an existing one there
2. Add Grouped window list applet to the top panel
3. Turn on the Enable app button dragging option of the Grouped window list applet on the top panel
4. Drag an app icon to a new position in the Grouped window list

Expected behavior

App icon stays at the place it is dropped

Additional information

Workaround: move the panel to bottom, there icons can be rearranged. Then move the panel to the top.

Top panel has other issues: when Auto hide / Intelligently hide option is on and the mouse moves to the top edge of the screen, it shows very rarely. The bottom panel always pops up when mouse hits the bottom.

Start by reproducing the drag behavior with the Grouped window list applet on a top panel, then trace the applet and panel handling for the top-panel position. Compare it with dragging on a bottom panel. Done means app icons remain in their dropped positions on top panels while app button dragging is enabled.