Hi,
Thanks for your answer. It worked just fine until now. I winded it to the maximum and it showed the same behaviour. More than that i took it to a local Ulysee Nardin authorized service and they told me that it has been magnetised. They demagnetised it and it still didn't work right. Probably my only change is Ulysse Nardin Le Locle Service but this means more than 3 months without wearing it. 
I am so sorry i liked this watch a lot, but i am a little disapointed now.