RadzenUpload only works once

Radzen.Blazor Components
1

I have a strange problem with RadzenUpload where it only works for the first time.

Here are the relevant code bits:

            <RadzenUpload Url="@($"upload/{_uploadId}")"
                          Visible="@(!_uploading)"
                          Progress="OnProgress"
                          Error="OnErrorAsync"
                          Complete="OnComplete"
                          Name="file"
                          Accept=".inp,.inp.gz,.inp.bz2,.inp.xz,.tar,.tar.gz,.tgz,.tar.bz2,.tbz2,.tar.xz,.txz,.zip,.rar,.7z" />

    private void OnProgress(UploadProgressArgs args) {
        _uploading = true;
        _progress = args.Progress;
        args.Cancel = _cancel;
        _cancel = false;
    }

    private async Task OnErrorAsync(UploadErrorEventArgs args) {
        try {
            await _uploadService.ClearUploadAsync(_uploadId);
        } catch(Exception e) {
            _logger.LogWarning(e, "Failed to clear upload: {msg}", e.Message);
        }
        _uploading = false;
        _cancel = false;
        _prep.FileUploaded = false;
        await _dialogService.Alert(string.IsNullOrWhiteSpace(args.Message) ? "The file failed to upload" : args.Message,
                                   "Upload failed",
                                   new() {
                                       AutoFocusFirstElement = true,
                                       CloseDialogOnEsc = true,
                                       CloseDialogOnOverlayClick = true,
                                       Draggable = true,
                                       OkButtonText = "OK",
                                       Resizable = true,
                                       ShowClose = true,
                                       ShowTitle = true
                                   });
    }

    private void OnComplete(UploadCompleteEventArgs args) {
        _uploading = false;
        _cancel = false;
        _prep.FileUploaded = true;
    }

This works for the first time. When I then try to upload a second file, I get the following:

Uncaught Error Error: System.ArgumentException: There is no tracked object with id '4'. Perhaps the DotNetObjectReference instance was already disposed. (Parameter 'dotNetObjectId')
    at endInvokeDotNetFromJS (localhost꞉5030/_framework/blazor.web.js:1:3502)
    at _invokeClientMethod (localhost꞉5030/_framework/blazor.web.js:1:62841)
    at _processIncomingData (localhost꞉5030/_framework/blazor.web.js:1:60316)
    at connection.onreceive (localhost꞉5030/_framework/blazor.web.js:1:53957)
    at i.onmessage (localhost꞉5030/_framework/blazor.web.js:1:82102)

Do I somehow have to reset the component before I can do another upload?

2

I am answering myself so this can be clearly seen as the solution.

The problem was the Visible attribute. Setting this to false does not only seem to hide the element but also unregister some things that don't get re-registered when it is set to visible again. Hiding it via CSS by setting display to none !important makes the problem go away.