So, the Cash Shop cart doesn't actually empty after you make a purchase. I bought the monthly collections I needed the other day, and I noticed today that they were all still listed in the cart (though my purchase went through just fine). I emptied it out to add the bobbleheads I needed, which are now also still listed in the cart (but that purchase went through just fine too).

I also got the following fatal error trying to make a purchase:

I just got this error as well, when putting csc cards into my cart so I wouldn't have to buy them one at a time. The cards were also still in my cart.

Same problem. Purchase went through fine, but the cart didn't empty itself afterwards.

Same thing happened to me. Got items, CSC deducted, but cart didn't empty.

I got the same error when purchasing the bobbleheads, but the purchase went through fine.

Same problem here as well, but I received my items.

I had this problem over the weekend when I bought the bobbleheads, again when I bought the new monthly challenger, and again today when buying some of the Delish items. The purchase goes through fine (items show up in my inventory immediately), but there's a fatal error after purchasing the items. Cart doesn't empty on its own and has to be done manually.