Subitems deleted when pulse was moved to a different board

I have a bunch of task boards that all have the same layout in different workspaces. The idea was to easily be able to move a task from one board to another should a different team need to continue working on it. The problem is that if I move a pulse that has sub-items, all of those sub-items are removed and I have to recreate them. There was already a subitem column created the destination board, those sub-items should transfer with the pulse.

Wij hebben inderdaad hetzelfde probleem. Hoe kunnen wij de subitems mee dupliceren?