This is a very annoying yet easy-to-fix issue. On kanban board, it's very disturbing and misleading to show either 0% or 100% completion, when the task does not have any action item. You say on the tooltip: "0% of subtasks, checklists, and assigned comments completed" which is misleading, because the task does not have any. 0% could mean that there is an action item but not solved. Setting it to 100% when there are no action items implies the task is done, even when it's still in TO DO status. Would be much clearer, if we can see completion only when there is action items to be solved. This could be only a switch in Layout options on Kanban boards.