Skorpio X4 Remote Desktop Timeout

we are experiencing an issue with two Skorpio X4 WEC7 units. They are used as Remote Desktop clients, and they keep disconnecting from the terminal server when not actively used. We were not able to solve the issue by setting group policies on the server, so it caused by the devices.

Looking on the web we found this doc from Microsoft:
which is related to windows mobile 6.1-6.5, where they point to the fact that the mobile RDP client has an hardcoded timeout of 10 minutes, starting from windows mobile 6.1, and suggest developing a small program that sends a mouse move event every 5 minutes.

Are you aware of this kind of issue? Are there some solutions you can provide?