[1 - Card not received after buyout auction, got empty mail]

Update:

So I bought the card again. And it worked. Played a few matches. Then I couldn't play the card in a match. When I relogged the card was gone from my collection. This is the 2nd card that I succesfully bought from AH (just after).

So now the second card is gone too.

[1 - Card not received after buyout auction, got empty mail]

• NAME: Card not received after buyout auction, got empty mail
• SEVERITY: 1 
• LOCATION: Auction House
• REPRODUCIBILITY: First time it has happened. 
• DESCRIPTION: Bought a couple of cards. This one just disappeared. Not sure if it happened while collecting the other cards, or if it never arrived in mail.
• SCREENSHOT: Screenshot of mail and search in cards, it's not there.
• ADDITIONAL INFORMATION: So it's 1. mail never arrived, 2. it failed while pressing collect all, 3. it failed because I had 2 mails ready for buyout and I opened the first, and the second then failed. Not sure!