iOS App Icons are appearing as default icons rather than custom ones.

1. What happened

iOS App Icons are appearing as default icons rather than custom ones. The total number of icons returned is only 9 (via GetIconSizesForTargetGroup()) while on 5.5 it was 15.

2. How we can reproduce it using the example you attached

1.) Unzip/open the test project.
2.) Run the test project in the Unity editor to generate/copy the icons.
3.) Confirm that the icons have been copied from the source location and are now present in Assets/Icons.
4.) Run a standard iOS build from the Unity "Build Settings" window.
5.) When build is finished, go into the Xcode built folder, to Unity-iPhone -> Images.xcassets -> AppIcon.appiconset.
6.) Note that the icons present are all the default Unity icon, not the custom assets specified via SetIconsForTargetGroup() in Step 1.

License type: Pro