Use WhenAnyValue
MODIFY
WalletWasabi.Fluent/ViewModels/Wallets/Receive/ReceiveViewModel.cs
WalletWasabi.Fluent/ViewModels/Wallets/Receive/ReceiveViewModel.cs
@@ -33,7 +33,7 @@ namespace WalletWasabi.Fluent.ViewModels.Wallets.Receive
SuggestionLabels = new SuggestionLabelsViewModel(3);
- NextCommand = ReactiveCommand.Create(OnNext, _suggestionLabels.Labels.ToObservableChangeSet().Select(_ => _suggestionLabels.Labels.Count > 0));
+ NextCommand = ReactiveCommand.Create(OnNext, SuggestionLabels.WhenAnyValue(x => x.Labels.Count).Select(c => c > 0));
ShowExistingAddressesCommand = ReactiveCommand.Create(OnShowExistingAddresses);
}

Use WhenAnyValue