BUG - Card cannot be added to Deck

Hello, i want to report a bug with the current version. (still happening after clearing cache + cookies and re-logging into dropbox for sync).

-> I cannot add cards to my deck, happened when i tried under collection adding a card i own to a decks maybeboard, it just doesnt work. the card i rightclick -> deck -> + button on maybeboard makes the card disappear. It is really strange. Best Regards

Stefan