Select an object in Picker NavigationStyle

Hello everybody,

I have a problem with the Picker in SwiftUI. I try to create a Picker in a Form with NavigationStyle:

Picker("Member", selection: $member) {
    Text("None")
        .tag(nil as Member?)
    
    ForEach(members) { member in
        Text(member.fullName)
            .tag(member as Member?)
    }
}
.pickerStyle(.navigationLink)

But if I am selecting an object oder None, nothing change. I try the same code with PickerStyle .inline and the Code work a aspected:

Picker("Member", selection: $member) {
    Text("None")
        .tag(nil as Member?)
    
    ForEach(members) { member in
        Text(member.fullName)
            .tag(member as Member?)
    }
}
.pickerStyle(.inline)

I also try the same code with String (not with Member) and this works fine. I'm a bit confused because it doesn't work in PickerStyle NavigationLink only.

Can you help me or is it a bug?

More code:

@Query(sort: \Member.givenName) private var members: [Member]
@State private var member: Member? = nil

Thanks a lot