Check your Steam notifications and accept the trade offer again if this happens and you will receive your item. If you do not, the trade will expire and your credits may be stuck in the pending trade. To make it more confusing, sometimes those offers will appear to be blank. Refreshing the page will sometimes fix that, but not always. Further, the old "item doesn't appear in trade" issue continues, but now in a slight variation where it might show some items but not all. Adding and removing an item quickly will usually resolve this. This is all happening in both person to person and automated trades and none of it can be avoided. We hope Valve addresses the issues, but until they do, we appreciate your continued patience.