We have found that on iOS 26 beta some of our app icons built from an Xcode 16 asset catalog containing a single 1024x1024 .png file have a Liquid Glass effect applied to them while others have not.
The documentation states that
If you choose not to use Icon Composer, you can still use an AppIcon asset catalog in your project containing individual app icon images and let the system apply the Liquid Glass material.
If you prefer, you can take advantage of the system’s automatically generated treatment that is applied to all app icons.
Is there any insight into how the system treats app icons that have not yet been updated with Icon Composer?