FYI - I just want to share the positive message that this issue has (silently) been solved with NW 19.6.1.0.
You better control your restarted workflows in NW 19.6.0.x. I was surprised because these backups ended very fast - they just took some seconds. However, the workflow did not backup anything because it thinks that the second attempt was restarted outside the restart window: [IMAGE] So please do not just rely on the 'successful' icon - always check the logs as well.   BTW - I have verified this for versions 19.6.0.0, 19.6.0.2 & 19.6.0.3  
Be careful once you have restarted a workflow in NW 19.6.0