I'm not sure whether the deployment module fully supports running multiple deployments on the same machine at the same time. I know there were issues with simultaneous deployments in the past. If you haven't already, could you update to the latest Lansweeper release (5.3.0.34) by following
these instructions and see if the issue persists. If it does, I would recommend contacting our development/support team directly at support@lansweeper.com