Why the app is crashing when tab change (EXC_BAD_ACCESS)?

I have a custom tabbiew in my app. It works fine until I go to a subview of a tab. For example; from the Feed tab I click to Messages tab, then click to see the contents of a chat, then I click Feed tab again and crashes immediately.

struct ContentView: View {

//.....

@StateObject var viewRouter = ViewRouter()

var body: some View {
    GeometryReader { geometry in
        VStack {
            Spacer()
            switch viewRouter.currentPage {
            case .feed:
                NavigationView {
                    FeedView(posts: feedPosts, title: "Feed")
                }.navigationViewStyle(.stack)
            case .browse:
                NavigationView {
                    BrowseView(posts: browsePosts)
                }
                .navigationViewStyle(.stack)
            case .messages:
                NavigationView {
                    ChatListView(newMessage: $newMessageAvailable)
                }
                .navigationViewStyle(.stack)
  //......
struct ChatListView: View {

//....

var body: some View {
    ScrollViewReader { proxy in
        ScrollView {
            if (!gettingMessages) {
                if (commentArray.count > 0) {
                    VStack{
                        ForEach(commentArray, id: \.chatID) { comment in
                            NavigationLink(destination: ChatDetailView(keepViewOpen: self.$keepChatViewOpen, recipientID: getRecipientID(comment: comment), recipientName: getRecipientName(comment: comment)), isActive: self.$keepChatViewOpen
                                           , label: {
                                ChatListItem(comment: comment, recipientName: getRecipientName(comment: comment), userID: getRecipientID(comment: comment), read: comment.read)
                            })
                            
                        }
                    }

There is nothing fancy in ChatDetailView and the crash happens for every kind of view provided that it is a view navigated from any other view with navigation link. The error is as follows: Thread 1: EXC_BAD_ACCESS (code=1, address=0xf2010803e530)

Why the app is crashing when tab change (EXC_BAD_ACCESS)?
 
 
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