I agree that we should display an error but I'm afraid there's no "pause" in Foreman's provisioning. Host is either in build or not build mode. Also if it would be in some "pause" state we'd need bulk "continue" action. I think this could be implemented if we eventually migrate orchestration to dynflow tasks. Btw what are your steps for fixing it when this happens and what is original cause of error that the image is not downloaded, is that wrong installation medium URL?