Can only move large corpses from the top left

You can inspect and retrieve items from large corpses wherever you are stood on them. And you can single click and drag the mouse wherever you are stood on the corpse and you see the whole image move. But when you release the mouse the corpse doesn't actually move to where you wanted it. You can only move it if you are at the top left corner of it. You should be able to move it if your square intersects with the corpse area.

(in fact with all items on the ground (even those you are not next to) you can click on the item and drag it around but when you release it doesn't drop, since you were not next to it. this is because client doesn't know you're not allowed to move it because you're not next to it, i guess. anyway for small items it's not really an issue but for the big corpses when you think you should be allowed to move them it's confusing.)

(for testing try it with a balrog corpse or black dragon corpse, they should be big enough to see the effect, but also corpses of necrosophia, flying golden dragon would do it too.)

weirdly the 2x2 corpse of giants you can move about even if you're at the bottom right corner of it like um
cc
cc
x

player is where the x is.