UE 5.8: Fullscreen PIE does not cover Windows taskbar on Windows 11

Summary

Environment

-Unreal Engine 5.8
-Windows 11
-External monitor set as Primary Display
-Reproduces in a brand-new Blank project

What Type of Bug are you experiencing?

Editor

Steps to Reproduce

-Create a new Blank project.
-Play in Selected Viewport.
-Enter fullscreen PIE (describe whether you press F11 or another shortcut).
-Observe the Windows taskbar.

Expected Result

-Fullscreen PIE should completely cover the Windows taskbar.
-If auto-hide is enabled, moving the mouse to the bottom should not reveal the taskbar.

Observed Result

-With auto-hide enabled, moving the mouse to the bottom causes the taskbar to appear.
-With auto-hide disabled, the taskbar remains visible during fullscreen PIE.
-This behavior did not occur in previous version like 5.6.

Affects Versions

5.8

Platform(s)

Windows

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