Pressing the F5 or F6 keys alone can only receive keyup signals

[Windows 11]

Pressing the F5 or F6 keys alone can only receive keyup signals, while pressing the Shift/CTRL and F5/F6 combination keys can receive keydown and keyup signals. In the past period of time, I have not installed any new software. Systems, or driver programs that have not been updated.After uninstalling all keyboard drivers starting with "HID" and restarting, I found that pressing the F5 or F6 key alone could receive both keydown and keyup signals, and then returned to the situation where only keyup could be received.

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