...alright. I have contacted my LBS two times and no answer. So I decided to buy a new hub. Can't wait whole summer without bike! Don't wanna see these crap hubs anymore so I bought the same one as my rear hub. Now I look at the future with Hope!
still I got answer from my LBS. He had contacted Haibike and they say warranty is not covered by this. Well, no surprise. But still sad. He offerred me to buy new wheel sets.
He also said that in his store they had not heard of this issue but he had heard of several cases from a bigger store in our capital. Also the same hub, XLC Evo.
I also got a comment from another user that had the same problem.
Personally, my new hubs have worked just fine since fitting, they have rolled 1036/368 km (rear/front). And I can now easy remove the wheel without problems getting axle stuck (and bike have now rolled almost 3000km without other problems than this so overall happy).