as title, if setting reuseItems as false,
when expanding a node, TreeView should insert new items, and only create delegates for new items, but the truth is:
TreeView destruct all items, and then recreate all of them, I don't know if it is design or bug.

if design, what is the reason?

I think the reuseItems is for recycle of items moved out of screen or deleted nodes, is it?

in attached project, expand or collapse a node, it will print create/destruct info.