I try to find solution with this Azure problem. I don't want to bother nop team now.
I did new release today.http://foxnetsoft.com/content/files/Nop.Core.dll.zip
Can you try to check it on your test store with default nopcommerce settings
Copy back default values and try this DLL.
//Enable if you want to clear /Plugins/bin directory on application startup
//Enable if you want to copy "locked" assemblies from /Plugins/bin directory to temporary subdirectories on application startup
//Enable if you want to copy plugins library to the /Plugins/bin directory on application startup
//Enable if you want to load an assembly into the load-from context, by passing some security checks
Thank you for your report.