I have a bunch of Wyse 5470 AIO's connected to the Wyse Management Suite Server running WES, a few of them occasionally have the Wyse Device Agent app open randomly on the registration screen and sit in front of everything like the image below, it stays there until you manually close it.

Does anyone know what causes that to happen and how I can stop it? It doesn't happen on all clients, all are running the same firmware version. I have looked through the logs but i'm not sure what i'm looking for as nothing appears to be wrong.