As Microsoft has not yet released a fix yet, I use a workaround.
The following workaround is for desktop systems with an external display.
I have such a system, and at random times the taskbar is completely empty after the pc wakes from sleep.
Workaround steps:
- Right-click the desktop area.
- Select "Display settings".
- Click on "Advanced display".
- Click on the "Refresh rate" button.
- Select and switch to a different frequency.
- Click the "Revert" button.
- See the Taskbar appear again.
This works on my system (Lenovo Windows 11 desktop pc, with an external LG 5120x2160 monitor connected via DisplayPort 1.4 cable).