Symptoms

Radio buttons not displaying data when editing a submitted form in Production only.
 

Diagnoses

From examining the differences between Prod, Dev, and QA, it looked like changes had been made to the data types of the SmartObject fields behind the Choice controls. Local tests showed that having a data type of Text behind a choice control worked best.
 

Resolution

Where data was being saved but not displayed, change the SmartObject data type behind the affected Choice controls from 'YesNo' to 'Text'. Where data was not saving, make sure that on initialize that the data is being loaded via output mappings. This field was not mapped.