Hello,
I have tried the way disribie by you, and once I heard little "tick" so indeed, something released card. But I still prefer my way, though it stands in contradiction with the purpose of this "protection mechanism".
I use two fingers to release, one preses the card, second covers/prevents that it will not fly away. The first one preses and releases the card (shoots the card), second finger prevents it from flying away.
I know that it may be not the best way, but it looks really funny, when You release card, it flies up (you made it flying on purpose), and then grab it.... Just like in a movie, when after shooting you grab a shell in the air
I could not find any other reasonable way....If there was any intended mechanism - it would have been described in manual. and is not...