Bugged Den Items

This commonly occurring glitch makes it look like you don't have any den items when you do. This random event glitch can be used to put 13 items on trade, see here. It happens randomly when you only have den items on your trade list. While you are glitched, trying to trade/sell/gift/recycle den items will not work, and you can't put more den items on trade. You cannot place any den items inside your den when this happens. You can fix this glitch by switching rooms.