Why the subscriber of WhenAnyValue is not triggered on property changes after re-subscribing?

I have MAUI application with ReactiveUI.MAUI and ReactiveUI.SourceGenerators packages.

Here is view model:

public partial class VM: ReactiveObject{    [Reactive]    public partial string? Property { get; set; }}

View should monitor for property changes and do something. Tricky part is that view will be loaded/unloaded when navigating to/from certain FlyoutItem, containing view. Unsubscribing therefore is important.

Showing view first time - everything works. Unloading and then loading view again - subscribing doesn't work anymore.

Here is working code (works all the time):

VM? vm;public View(){    Loaded += (s, e) =>    {        vm = BindingContext as VM;        vm?.PropertyChanged += VM_PropertyChanged;    };    Unloaded += (s, e) =>    {        vm?.PropertyChanged -= VM_PropertyChanged;    };}void VM_PropertyChanged(object? sender, PropertyChangedEventArgs e){    ... // breakpoint here is always hit}

Here is not working code, subscriber is not detecting property changes after unloading and loading view again:

readonly CompositeDisposable disposables = [];public View(){    Loaded += (s, e) => Init();    Unloaded += (s, e) => disposables.Dispose();}void Init(){    if (BindingContext is not VM vm)        return;    vm.WhenAnyValue(o => o.Property)        .Subscribe(property =>        {            // problem: not triggered on property changes after re-loading view        })        .DisposeWith(disposables);}

Why in reactive approach the property changes are not detected anymore after unloading the view and loading it again?

The Load/Unload events are working like clocks (checked with breakpoints). The subscriber is triggered once when Init is called as expected.

VM instance doesn't change if that matter.