Internal move deletes items that are not marked "drag enabled"

When selecting multiple items with ItemIsDragEnabled turned on and off and drag&dropping them via internal move to a new parent, then the items that are ItemIsDragEnabled are moved to the new parent while the other items that are not drag enabled a not left in place but deleted.

Try the attached example for a demonstration: Select items "NO" and "B". B is drag enabled but NO not. Drag the two item selection over to "D" and drop it there. Upon expanding D you see B reparented under D but NO has gone.