same problem here. userdefaults used by app and widget extension.
I found that if i access userdefaults about 3060 secnods after app launch, i can get the right data.
also, if create a userdefauts from share group about 3060 seconds after app launch, the userdefaults object is at its right state.
Yuyuan
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Same problems here. Animation seems broken in Widget of iOS 18.
.activityBackgroundTint(Color.clear)
work for me