AutoDesk Desktop Connector and AddinProcess.exe

Desktop Connector uses the AddinProcess.exe 

This is normal operation for Desktop Connector.  These AddinProcess.exe are a normal Microsoft component for running out of process addins which Desktop Connector utilizes:

https://docs.microsoft.com/en-us/dotnet/api/system.addin.hosting.addinprocess?view=netframework-4.8

They do not shut down by themselves even when Revit and the add-in is terminated and they consume memory because they are not associated with Revit, they are associated with Desktop Connector.