Some specific users can't use DLU on specific workstations

Hi, lately I have been getting reports that some users can't use the volatile user DLU on specific workstations. For example, the user A can login without any problem on the workstation #1. But when he try to login to workstation #2 with the same rights (user volatile assign at the devices) he get stuck at the screen where he must enter the local Windows password for the account "Administrator". But any other users can login normally using the DLU on workstation #2. Has anyone seen this before? I tried looking in the logs in debug mode but I can't recognize any pattern or specific error. Any suggestion? Where should I look to correct this?

Thanks in advance for the help!