Teams and office programs are logged out

Team and office programs are logged out

1. Register the device in the MDM policy at login
2. Device Registered Successfully
3. Use MS Office normally (Team, Outlook, etc.)
4. After a few hours, the office login window suddenly appears
5. Once you enter your password, the device registration screen will reappear
6. Available normally again

Please tell me the reason use normally until two months ago Some PCs show this symptom