Ionic-Native ZeroConf not working on IOS

So I made the App with a Android Device in the development Process and everything worked fine like it should. Then I tried building it for IOS and nothing worked I just got a white screen. So I made a test app which just the ZeroConf Plugin in it and fetching something completely simple.'_scanassist._tcp.', 'local.').subscribe(result => {
       console.log('SOMETHING WAS FOUND!')
       alert('SOMETHING WAS FOUND')

Just tested it on Android and everything worked like usually but when on IOS it does not. I execute this code in the constructor if my main page, could that be the problem? After that I put it in a setTimeout and the side loaded but Zeroconf did not give me an alert even it should give me one.