This is not a frequent issue, but it's known to Loader team. It affects some of the supported apps. Unfortunately, this behavior is entirely on the app's side and has no relation to Loader performance.
It primarily affects users who use Undo to remove recent Updates. Users see a blank data field instead of the previously updated value. It is essential to note that it only impacts some Link To fields and not all data fields.
We recommend that you test your Update setup and run Undo with a limited number of records before performing bigger Updates.