Hello,
Thank you for posting in Q&A forum.
To further understand the issue, please kindly provide the screenshot when you get the loose focus issue. Meanwhile, as this is a user based issue and you will only face this issue, there's possibility that user profile is corrupted. You can try to create another domain administrator account and loggin to see if the issue still persists.
Hope this answer can help you well.
Best regards,
Jill Zhou