Forums mIRC Help Taskbar icon not flashing with Windows 11

Just to confirm: are you referring to the mIRC icon in the Windows TaskBar? Or the mIRC icon in the Windows System Tray?

The Windows TaskBar is the horizontal bar at the bottom of the Windows desktop, where app icons appear if you minimize an application.

The Windows System Tray is the right-most part of the Windows TaskBar, where small icons are displayed.