Can someone explain why this state property is nil despite being updated before the other state property?

I took CKShare with Zone example - https://github.com/apple/sample-cloudkit-sharing

Modified it a little bit so code looks like this:

struct ResourceView: View {
    @State private var showingShare: Bool = false
    @State private var shareView: CloudSharingView?
...


    var body: some View {
        HStack {
            Button(action: {
                Task {
                    let (share,container) = try! await shareConfiguration()
                    shareView = CloudSharingView(container: container, share: share)
                    showingShare = true
                }
            }) {
                Label("Share", systemImage: "circle")
            }
...


        .sheet(isPresented: $showingShare) {
            if let shareView = shareView {
                shareView
            } else {
                Text("No sheet to show")
            }
        }

And the first time I click on Share button I am getting "No sheet to show" despite showingShare boolean being set after shareView variable. Presumably because shareView is nil.

The second time I click on Share button it shows the sharing view.