Some settings to take effect need to restart the device to validate the change in settings.
I recommend that you check the link below on how to remove this user:
Also, I recommend that you create a question within the Windows 11 team forum, because this can be a general problem and the more people reporting the faster the problem will be resolved.
To do this, access the link below and select the option "Ask a question" from the top menu and describe the entire problem, including images:
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--If the answer is helpful, please vote positively and accept the answer--