I think the best option is to reproduce in the app store version. The app is Lineskip POS from LineSkip Inc. The app's Apple ID is 1051522633. Sign in is required. I'll assume you can use the account and password provided for App Review. If not, please let me know how I can get you the credentials.
Steps to reproduce:
Add an item to the cart (select By the Slice / Pepperoni)
Tap the Pay & Send button
Tap "Split Check"
This should result in a crash.
Topic:
UI Frameworks
SubTopic:
UIKit
Tags: