Error:Unexpected character '' (code 65279 / 0xfeff) in prolog; expected '

Hi All,

I'm using Windows C# client as below version:

Somehow I got random / intermittent error popped up:

Error:Unexpected character '' (code 65279 / 0xfeff) in prolog; expected '<' at [row,col {unknown-source}]: [1,1]

So I wonder if that's recent issue with the Windows 10 .NET framework update ?

My other C# client same version on Windows Server 2008 R2 is not having the issue.