Greetings once more, Rentahamster!
Thank you for your patience with waiting for a response regarding your concerns about the cooldown timer. After thoroughly investigating this matter, the development team deemed this to be a result of latency in the game, so it has not been determined to be an issue with the game itself. If you continue to encounter this trouble, I recommend contacting the SQUARE ENIX Support Center at http://lodestone.finalfantasyxiv.com/pl/index.html under "Support Center">"Contact" for any advice to reduce the latency that you may experience in the game. Thanks again for your patience!