Move a tasktree (a task with subtasks) to a new tag. You will see the maintasks directly under the new tag, but the subtasks are not always visible.

After restarting zanshin the move to other tasks works as long as the order of the taskstree is not changed.

1. create two tasks
2. make a hirarchy:

--task1
  |-- task 2

3. move task1 to tag1
4. open the tag view and look for

--task1
  |-- task 2

at the moment only task1 is visible.