Hello, 

i have integrated data form in our application, it's working fine in android, ios simulator, when we tried it in ios device (iphone XR) its load and views are good but when we clicked on text editor inside of data forms we face app crash. 

Please refer to the attached project that reproduces the issue. In the MainPage constructor, you can switch between using the PickerEditor (validation works) and the SegmentedEditor (validation doesn't work).

This leads to other issues like the PropertyValidationCompleted event not firing.

Thank you,
Mohamed

 Nullable int property is validated against range when no data is input.