Items burnt out in a fireplace (tested with wooden sticks, rags and bark) don't disappear, but visually still fill the fireplace's inventory, adding more stuff in leads the new items going to a second row of items which the fireplace clearly doesn't support as its inventory view doesn't scale downwards to a second row. These burnt out items that should have disappeared, while manipulated by the player, cause the player to get stuck between animations (e.g. if the player was holding a long wooden stick with meat in the fire, trying to manipulate the burnt out items causes the player's hands to be stuck in the position where they held the stick even if the stick is taken off the hands), this is fixable by changing action (e.g. pulling out an axe).