Hi happyoutkast,
Welcome to the Microsoft community and thank you for asking your question in the community!
From your description, I understand that the account you are having the problem with is under domain control and that you are not having the problem with your local account set to dark mode, so it may be related to the domain management configuration file. I suggest you contact your IT administrator to change the configuration policy of your domain control to try to resolve the problem.
Please let me know if I have misunderstood. Tell us the results and we will get back to you as soon as possible. We look forward to hearing from you.
Best regards,
Zhang Yang - MSFT | Microsoft Community Support Specialist