I made multiple purchases this morning with the same or similar issue.
I bought 10 “Vials of Thin Blood” and they did not appear immediately in my “Pickup” tab. I was confused because my money was gone and the items showed up in the “History” tab under “Items I’ve Bought…”.
Thinking I messed it up, I ordered 10 more. Same thing — coin removed but no items for pickup.
I logged out and back in with no results. Items sill not delivered in the “Pickup” tab.
About 5 minutes later the items appeared. So I thought it was a burp of some sort.
I orded 10 small claws. The coin was removed from my inventory but this time the items do NOT appear in the “History” tab under “Items I’ve Bought…” nor “Items I’m Buying…”. They items have not been delivered and it’s been over 10 minutes. I’m pretty sure they were puchased because I do not see my price reflected on list of open orders for the Small Claws.