Taskbar buttons expands to fill the whole taskbar after rearranging windows in multiple row taskbar

Hi,

Just want to inform about this bug: all the taskbar buttons expands to fill the taskbar width after rearranging windows. This only happens when

1. The taskbar is set to multiple row
2. The dragged windows is a window group (i.e. consists of several windows)

Before



After



This is my taskbar tweaker settings