Ghost window (DesktopWindowXamlSource) is shown again (see issue #6507)

[TuxTom]

Windows Terminal version

1.19.2831.0

Windows build number

10.0.19045.0

Other Software

No response

Steps to reproduce

• Open Windows Terminal

Expected Behavior

Just one window being shown in the taskbar/window switcher list.

Actual Behavior

Besides the actual application window, another dummy window with the name "DesktopWindowXamlSource" is shown. When the dummy window is closed, the actual window is also closed.

[TuxTom]

I also tried this with Windows Terminal version 1.18.2822.0, I have the same effect.

[zadjii-msft]

Huh. I coulda swore this was fixed with #15165.

A possibly dumb question - does this repro on a "cold launch" of the Terminal? Like, there are no other terminal windows running, there's no tray icon, nothing. Just the first, single window? (this would help eliminate window refrigeration as a possible root cause).

[TuxTom]

In most of the cases, the ghost window appears immediately when performing a "cold launch" of the terminal. Yet, in some rare cases the ghost window is not shown.

One more observation: I have the application window on the second display, it also appears there when it's launched. In most cases when the ghost window is shown, the window is opened on the second display and the ghost window is also shown in the taskbar of the second display. The taskbar entry for the actual window appears on the first display, though. When I move the application window to the first display and back, the taskbar entry is taken along to the second display.

I even had one case, where no ghost window was shown but the taskbar entry for the application window was still shown on the wrong display.

[fighur]

I've also been experiencing this recently. In my case, it seems to happen only when I have FancyZones enabled.