The Project you’re running on Raspberry is not very small. Maybe the Shutdown and Power On problems with the Projectors come from a heavy CPU load. I,m sure on a small x86 CPU you will not have these problems.
V-Control asks each connected projector periodically for power, input and lamp status. Maybe it helps to reduce the intervall for theese polling commands.
You can open the device editor, select the Projectors one after each other, and look for Monitor Commands. The increase the value for periodically execution, click “update command” and switch to the next command. If finished click the compile button.
I’m in a train now,answering from my mobile phone, so I’m not able to give more detailed instructions.