What gameplay feature is this bug affecting?
Decoration

What's the issue? Please include any error messages you receive and as much detail as possible.
Items that appear in the equipper and the hoard overview do not appear *in* hoard, TC or otherwise.

I tested by equipping from the equipper (cold breath) and the item got equipped as normal. However, the item did not appear in hoard even after un-equipping (see screenshot).

There are 6 items I have documented this with:
Adoring challenger Black
Black wings
Cold breath
Flesh of the unworthy
Cold breath
Siberian tiger

Any links relating to this bug? For example, if a particular lion is bugging, what is the link to that lion?
nope!

Any screenshots you can provide us with?
Here are a few links to the images (hopefully they should work)

https://media.discordapp.net/attachments/701495274782326840/1149218446534508555/image.png?width=578&height=676

https://media.discordapp.net/attachments/701495274782326840/1149218597395255326/image.png

https://media.discordapp.net/attachments/701495274782326840/1149218769273618442/image.png

https://media.discordapp.net/attachments/701495274782326840/1149218828107124796/image.png

https://media.discordapp.net/attachments/701495274782326840/1149220094623354901/image.png

(After un-equipping cold breath)
https://media.discordapp.net/attachments/701495274782326840/1149219184451006544/image.png

Please provide us with step by step explanation how this bug happened so we can attempt to replicate it. If it's complex, please include screenshots where possible:
I have no idea when this issue started. This is a decently old account.

I suspect it could be related to un-equipping decor from dynasty lions? But I have no solid proof of this (I just know I un-equipped a lot)