Error Saving Document if text including a comment is deleted from the editor Completed

If you delete a section of text which includes a comment and then attempt to save the document the component errors.

Save handler:

    public async void Save()
    {
        Logger.LogInformation($"Save Clicked");
        var editor = _editorContainer.DocumentEditor;
        Logger.LogInformation($"Got Editor");
        string base64Data = await editor.SaveAsBlob(FormatType.Docx);
        Logger.LogInformation($"Got Blob String");
        byte[] data = Convert.FromBase64String(base64Data);
        Logger.LogInformation($"Converted to data");
        Facade.UploadManuscriptData(ScenesState.Value.CurrentScene, data);
        Logger.LogInformation($"Send to Save Handler");
    }


Expected behaviour - byte[] containing the document is send to the Upload method.

Actual behaviour - error is thrown in browser and page crashes.

This save method works correctly if the section of text that was deleted does not contain any comments.

A similar error was apparent in version 18.4.0.49 - the error happens at the same place but the message is slightly different: