I'm seeing some odd behaviour with our app when its compiled using Xcode 13 and deployed to an iOS 15 device/emulator for a Release build.
The global accent color that is defined in the Build Settings isn't being found in the Release build so the default blue color is shown. But on a Debug build it finds the accent color just fine. And if I deploy to an iOS 14 device/emulator it finds the accent color for both Release/Debug builds. 🤷