Dropdownlist works but Filters throws errors

Radzen.Blazor Components
1

Hi, I am able to populate a Dropdownlist with my Data. I can manually select the Data and save to the Database successfully without issue or errors.

However, I when I use the Filter, nothing happens and in the console I get the below error (at this point I am then also unable to select anything.)

blazor.web.js:1 [2024-05-07T23:31:30.762Z] Error: There was an unhandled exception on the current circuit, so this circuit will be terminated. For more details turn on detailed exceptions by setting 'DetailedErrors: true' in 'appSettings.Development.json' or set 'CircuitOptions.DetailedErrors'. 
log @ blazor.web.js:1
unhandledError @ blazor.web.js:1
(anonymous) @ blazor.web.js:1
_invokeClientMethod @ blazor.web.js:1
_processIncomingData @ blazor.web.js:1
connection.onreceive @ blazor.web.js:1
i.onmessage @ blazor.web.js:1
7blazor.web.js:1 

Uncaught Error: No interop methods are registered for renderer 1
    at A (blazor.web.js:1:14023)
    at blazor.web.js:1:13929
    at D (blazor.web.js:1:14112)
    at R (blazor.web.js:1:13903)
    at P.dispatchGlobalEventToAllElements (blazor.web.js:1:16505)
    at P.onGlobalEvent (blazor.web.js:1:15698)


    RadzenDropDown<int?> countiesDropDown;
    protected override async Task OnInitializedAsync()
    {
        Loading = true;

        CountyService = (CountyService)ScopedServices.GetService(typeof(CountyService));
        _Counties = await CountyService.Lookup();

        Loading = false;
    }

<RadzenDropDown @ref=@countiesDropDown AllowClear="true" Name="County"
                FilterCaseSensitivity="FilterCaseSensitivity.CaseInsensitive"
                FilterOperator="StringFilterOperator.Contains"
                AllowFiltering="true" Class="w-100" Placeholder="-- Select --"
                Data=@_Counties @bind-Value=@Model.CountyId TValue="int?"
                TextProperty="Name" ValueProperty="Id" />
2

I was able to determine that the Filter does not handle null values. While this is technically an issue with our data, might be something to look at.

I got around it using..

 async Task LoadData(LoadDataArgs args)
 {
     var query =   await CountyService.Lookup();

     if (!string.IsNullOrEmpty(args.Filter))
     {
         query = query.Where(c => !string.IsNullOrEmpty(c.Name) && c.Name.ToLower().Contains(args.Filter.ToLower()));
     }

     _Counties = query.ToList();

     await InvokeAsync(StateHasChanged);
 }