I added new dark and tinted variants of my app icon for iOS 18. (It is a single size in Xcode.) Everything works fine when the app is installed — the home screen uses the correct version of the app icon depending on the appearance. Even in the TestFlight section of App Store Connect, the correct full-color icon is used.
However, in the upper left of App Store Connect, and most importantly on the customer-facing App Store, the grayscale/tinted version of the app icon is now being shown! This is not at all what I want — does anyone know why this is happening and how I can get the App Store to go back to using the regular full-color icon?