macOS 27: Multi-monitor screen black after moving Full-Screen Space

Hi everyone,

I am experiencing a highly specific UI rendering bug on a triple-display setup (built-in Mac screen + 2 external monitors) running the new macOS 27 Golden Gate MBP M5.

The Exact Trigger:

The bug only occurs when I open Mission Control (F3) and drag a Full-Screen application Space from one monitor to another display.

The Symptoms:

As soon as the full-screen space is moved to the target monitor, the screen where it originally came from instantly turns completely black.

• All desktop icons and the wallpaper disappear on that specific screen.
• However, the Dock at the bottom and the Menu Bar at the top remain fully visible and active. I can click on apps but nothing will open.
• If I open Mission Control, the desktop thumbnail at the very top correctly shows my wallpaper and layout on opened apps. But as soon as I exit Mission Control, the main workspace remains pitch black.

Current Workaround:

Running killall Dock in the Terminal temporarily forces the UI to reload, restoring the wallpaper and workspace. But doing this every time I move a full-screen window across my three monitors is extremely disruptive and not a permanent solution.

It seems like the new window server / rendering engine in macOS 27 fails to properly re-initialize or clear the dedicated Space on the original monitor after the full-screen window is moved via Mission Control, leaving a dead "orphaned" black Space behind.

Has anyone found a permanent fix for this multi-monitor Full-Screen Space bug in macOS 27?

Thanks for your help!