Adobe Air 32 Bug in mx.managers.LayoutManager with iPhone 6(s) & iPhone 8

Since iOS12.1.2 we have a bug with iPhone 6, iPhone 6s & iPhone 8. The app crashes. iPhone 7, iPhone 6plus, iPhone 8plus, iPhone X is working. Also iPhone 5 is working.

After debugging the app we found the problem in mx.managers.LayoutManager.

The App crashes at the line 844 with this content: obj.dispatchEvent(new FlexEvent(FlexEvent.UPDATE_COMPLETE));

  var obj:ILayoutManagerClient = ILayoutManagerClient(updateCompleteQueue.removeLargest());

            while (obj)

            {

                if (!obj.initialized && obj.processedDescriptors)

                    obj.initialized = true;

                if (obj.hasEventListener(FlexEvent.UPDATE_COMPLETE))

                    obj.dispatchEvent(new FlexEvent(FlexEvent.UPDATE_COMPLETE));

                obj.updateCompletePendingFlag = false;

                obj = ILayoutManagerClient(updateCompleteQueue.removeLargest());

            }

We have no idea how to resolve this.

Any suggestions?

Best regards

Johannes