Quang can transition issues from Resolved to Done using the workflow button on issues in...

If Quang can transition issues from Resolved to Done using the workflow button on issues in his project, but cannot drag them from Resolved to Done on the project’s Kanban board, a possible reason is that the statuses are mapped to the same column. The columns on a Kanban board represent the stages of work in a project. Each column can have one or more statuses mapped to it. To move an issue from one column to another, you need to drag and drop it to a column that has a different status mapped to it. If the statuses are mapped to the same column, you cannot move the issue by dragging it on the board, but you can still use the workflow button to change its status. References: Configuring columns, Moving an issue