Sold item are not delisting

I have multiple items not delisting after being sold. If I party up to sell the item, the slot that they were sitting in is highlighted, but empty. I have tried placing different items in those slots. The slot still highlighted with the new item in its place. Even disabling the trade tabs has not helped. I'm still receiving multiple trade requests every few minutes for items that I no longer have even without those tabs being public anymore.

I have the same issue

For some reason, an item I've already sold keeps appearing for other players.

Since it was a very cheap item, I keep getting a notification in the game every 2 minutes and this is completely ruining my experience with the game.

Please, I'm desperate about this, help fix this problem.