David J Anderson’s book on Kanban shows us that a way to handle ticket issues is by attaching a color tag to a ticket to make it visible. An issue is ticket-related event that becomes an impediment to its value flow, such as a defect, insufficient definition, unresolved dependency, etc. What I encounter often is, people have natural tendency to move the ticket to where the dependency lyes. Although Kanban does not stop us from doing so, this might not be the best of actions. If, for example, in the images here the dependency is on Patient Checking it might be tempting to move the ticket to the Checkin column.