How can I sort sub-tasks in Kanban?

[Albert Puigbó]

When I have sub-tasks in Kanban without it's parent task it's impossible to sort them with drag and drop.

Any tip on how to do it?

[Nic Brough -Adaptavist- · Accepted solution]

You don't.  Remember that sub-tasks are a part of their parent issue, not an independent issue in their own right. They can't take on ranks that would take them outside the rank of their parent.

It does not make sense to rank them outside the context of their parent issue, so when you remove those from your display, there's no container framework for their ranking.