Board Thread:Questions and Answers/@comment-5909662-20121225095145/@comment-5428123-20121225110938

This doesn't appear to be an isolated incident. There are reports of random suspensions and disappearing cards happenning all over the place. The game seems to be undergoing emergency maintenance, and I bet it's to fix the problems which seem to be cropping up all over.

My advice would be to email the support team. If you don't get a response back, don't fret as it likely means they're working on the issue you've described.