Hi Frank Han,
This is a known issue as mentioned on this blog https://techcommunity.microsoft.com/blog/intunecustomersuccess/resolved---support-tip-occasionally-occurring-with-ios-mam-and-office-apps/2617909.
To work around this issue if you have a user seeing an authentication loop, you’ll want to clear the credentials on the affected device. Using OneNote as an example, on the affected device, head to Settings > OneNote > Reset OneNote > Delete Login Credentials.