Upload mode not passing through on connector url (.NET CORE connector)

[tharris9d]

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Files are not uploading. We get a 500 error. When stepping through the filemanagercontroller.cs we noticed that the mode upload was always showing NULL. All other modes are working properly. The filemanager.js file looks like the mode is set to 'upload' properly but it's not passing through on the the post. We modified the c# code as an emergency workaround and the images started uploading. (See snippet below). We have upload as a capability. Is anyone else having an issue with the upload mode not passing through on the connector url?

///////////////////////////////////////////////////////////////
public IActionResult Index(string mode, string path, string name, List files, string old, string @new, string source, string target, string content, bool thumbnail, string @string)
{
try
{
if (mode == null)
{
mode = "upload"; //Temporary fix for file upload
//return null;
}