Unreal Engine Issues

UE-54307

iOS apps crash on devices with iOS version 11.2.2 when Metal 2.0 is enabled

iOS apps crash on devices with iOS version 11.2.2 when Metal 2.0 is enabled

UDN
Description

Launching an iOS App that is set to Metal 2.0 on a device with iOS version 11.2.2 causes the app to crash and return to the home screen. This was tested on an iPad Pro as I do not have access to any other iOS devices capable of iOS 11. This does not happen on iOS 11.1.1.

Regression?: Yes
This does not occur in 4.18.3

Steps to Reproduce
  1. Create a new project
  2. Change Max. Metal Shader Standard Target to Metal v2.0 (Project Settings > Platforms > iOS > Rendering)
  3. Change Minimum iOS version to 11.0
  4. Package the project for iOS
  5. Install the IPA on an iOS device with iOS version 11.2.2 (Tested on iPad Pro)
  6. Launch the app
    Result: The app crashes and returns to the home screen
    Expected: The app launches successfully

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Cannot Reproduce
ComponentUE - Platform - Mobile
Affects Versions4.19, 4.20
Target Fix4.20
CreatedJan 22, 2018
ResolvedMay 17, 2018
UpdatedSep 16, 2019
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