Hello Matteo,
Can you please confirm, if the following steps are sufficient to reproduce the problem:
- connect using Remote Desktop to another computer,
- run Metashape in server mode,
- run Metashape in worker mode,
- open Metashape GUI and submit the network task,
- wait a bit, disconnect from the machine by closing Remote Desktop.
Please also specify, if you observe any unusual behavior, if you have Agisoft Monitor started on another computer and connected to the server?