Potential SwiftUI Bug. Sheets with multiple detents appear to not deinitalise correctly.

As per the title, I've drafted up a bug report but just wanted to sanity check this is not intended behavior before I sent off the report.

Issue: If you present a sheet in SwiftUI using the .sheet(isPresented: ) and have multiple presentation detents on the view such as .presentationDetents([.medium, .large]) the view being presented appears to not correctly deinitialise when the view is dismissed.

I have a short sample view which can easily demonstrate this.

import SwiftUI

struct ContentView: View {
    @State var showSheet = false

    var body: some View {
        Button("Show Sheet") {
            showSheet = true
        }
        .sheet(isPresented: $showSheet) {
            DetailView()
            // With a single detent, the below class prints "this is denit".
                .presentationDetents([.medium])
            // When multiple detents are specified the detail view appears to not deinit properly.
//                .presentationDetents([.medium, .large])
        }
    }
}

struct DetailView: View {
    let deinitPrinter = DeinitPrinter()
    var body: some View {
        Text("foobar")
    }
}

final class DeinitPrinter {
    init() { print("this is init") }
    deinit { print("this is deinit") }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

If you run this code with just the .presentationDetents([.medium]) you get the expected behavior of the console printing:

1. this is init
2. this is deinit

every time you open and close the sheet.

However if you comment out .presentationDetents([.medium]) and uncomment out .presentationDetents([.medium, .large]) you only get this every time you open and close the sheet

1. this is init

Just wondering if this is expected behaviour and if it is, why? If not I can happily press submit on my bug report.

Cheers.