When using our Collector app on an iPhone, I edit features and my domains for each attribute look perfect. When use the same app on a Samsung (Android) device, the domain lists of values show but include NULL value as one of the choices that the user can pick.
The feature service for the Collector app is hosted via AGO. I have searched the support sites for a resolution with no success. Also, I have tried to constrain the feature class attributes with no nulls allowed. The AGO feature service fails to generate properly with this option.
Assistance is appreciated. This is an issue that we must resolve.