When picking up a tent with an arrangement of gear inside it, armor stands are left behind. When this happens, the following warning is printed to the log: [06:15:26] [Server thread/WARN]: Trying to add entity with duplicated UUID 514879f4-7523-4041-876d-b744a2fac712. Existing minecraft:armor_stand#7354, new: minecraft:armor_stand#7354.

I can make do with storing my armor in chests, but having an armor stand would be nice.

They also do not pick up wooden cranks, from AE2, I've discovered.