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FOR XML PATH(''), TYPE).value('.','NVARCHAR(max)')

An encoding issue with “FOR XML PATH”:

DECLARE @str NVARCHAR(MAX)= N'h&s_dor, Zoe&lee88AB'

select stuff(( select ',' + t.Alias from split ( @str, ',') t
                           FOR XML PATH(''))
                     ,1,1,'') EncStr



Solution:
FOR XML PATH(''), TYPE).value('.','NVARCHAR(max)')

select stuff((( select ',' + t.Alias from split ( @str, ',') t
                           FOR XML PATH(''), TYPE).value('.','NVARCHAR(max)'))
                     ,1,1,'') EncStr


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