6 days ago I ran into this problem, trade is working on account, I can buy items, items that are already on sale are being sold, but I can't sell new items.

I have 4 accounts with purchase orders, each account has about 1 million selling operations, all other accounts are functioning normally, but this acc feels like it was given a shadow ban.
Clearing the cache and cookies, changing IP addresses, other browsers does not help, the problem is the same with the mobile application

I have already tried to fix the problem through the Prototype script.Browser.WebKit = true; , but it did not give its results

I wrote to support, in the first ticket, they told me 3 times that I couldn't sell things for 7 days after purchase, but this doesn't apply to dota 2 items, they closed the ticket automatically
When I created a ticket for the second time, where I defiantly showed them that I could not sell items that had already been released from the 7-day lockdown, they replied that they could not help me and closed the ticket.

Has anyone experienced anything like this?