DLLs in method-config are loaded with internals?

(Aras 11.0 SP9) Hi, We're using Document.OpenXML to export the BOM list as an Excel file, and the recent update (2.8.x) included an "internal class IReadOnlyList" in the System.Collections.Generic namespace. his collides with the one in mscorlib, but it should not do so as the class is defined internally. I got this when logging in via ConsoleUpgrade to export some AML:

Unhandled Exception: Aras.Tools.SolutionUpgrade.CItemException: Failed login to Innovator; 

original error: Line number -35, Error Number: CS1685, Warning as Error: 
  The predefined type 'System.Collections.Generic.IReadOnlyList' is defined in multiple assemblies in the global alias;
  using definition from 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorlib.dll'

Line number -35, Error Number: CS1685, Warning as Error: 
  The predefined type 'System.Collections.Generic.IReadOnlyCollection' is defined in multiple assemblies in the global alias; 
  using definition from 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\mscorlib.dll'

Is Aras loading internal classes into the global namespace when loading DLLs from method-config? The issue has been fixed in OpenXML and will be included in the next release but for sure it'd be nice to know this behavior by Aras is by design or by accident.