Win11 Task View shows a black thumbnail for certain UWP apps after waking from sleep

This behavior typically stems from a desynchronization between the Desktop Window Manager (DWM) visual cache and the lifecycle status of Universal Windows Platform (UWP) apps during ACPI power state transitions. When Windows 11 enters a low-power sleep state, UWP applications enter a suspended state where their graphical memory frame buffers are compressed or cached to save energy. Upon wake, if the DWM architecture initializes its rendering loop before the app frame buffer is re-allocated in VRAM, Task View draws a blank or black container box. Classic Win32 applications handle redraw requests using standard GDI loops, which is why they recover cleanly.

While manual app restarts force a redraw, you can permanently mitigate this visual desynchronization using these native workarounds:

1. Reset the Graphics Driver Frame Buffer

Forcing a quick hardware-level reset of your active graphics pipeline is the fastest way to force DWM to rebuild its active visual cache arrays without closing open tasks:

• Press the keyboard shortcut combination: Win + Ctrl + Shift + B.

• The system monitor will blink briefly and sound a short chime, signaling that the graphical frame buffer has successfully refreshed.

• Open Task View to verify if the black thumbnails have re-rendered natively.

2. Toggle Hardware Acceleration in System Display Profiles

If the problem continues to trigger after wake cycles, adjusting the scheduling properties for system graphics scheduling stabilizes the suspended state memory layout:

• Open Settings (Win + I) and select System on the left menu, then click Display.

• Scroll down and click on the Graphics link parameter.

• Click the "Change default graphics settings" hyperlink text.

• Toggle the switch next to "Hardware-accelerated GPU scheduling" to Off.

• Perform a full system restart to lock the core configuration properties into place.