Find element via Accessibility Identifier does not work on Hardware Device

Hello guys,
after updating to Xcode 7 and ios 9 I cant find the element via the accessibilityId anymore on a real device.

The following code works fine on a real device and on a simulator with IOS8.4.

MobileElement usernameTextField = driver.findElementsByAccessibilityId(“usernameTextField”).get(0);

After updating it only works on the simulator but on a real device I cant find the element anymore.
Anyone facing the same issue?

Can you see the element in ARC or using the Inspector?