When items have been carried to a ladder and a villager is ‘interrupted’ the item then remains stuck.
Steps to reproduce:
Bit of an odd one to reproduce. Hit and miss on how to interrupt a villager midway through a ladder whilst carrying an item. Place a villager on full alert mid-way through a climb/descent ?
Villager would resume current task and pick up the item to be placed wherever.
Item remains unpathable.
window was left at the top of the ladder and never placed into side of building.
wooden block of wood would remain halfway up ladder and never moved to a stockpile.