Hello,
Thank you for posting in the Microsoft Community forum.
It is recommended that you first check for Windows updates and install any pending update patches. Restart the device after the update is complete. If the problem occurs after the most recent update is installed, consider rolling back the latest update.
As a test, you can create a new local administrative account to see if the phenomenon still exists.
Manage user accounts in Windows - Microsoft Support
Reference:
Use Random Hardware Addresses Option Greyed Out - Microsoft Community
I hope this helps.
Best regards
Jacen
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