SSRS - Blanks in Multiselect not returning a resultset

 select row_number() OVER (order by t1.cTitle) as titlerow,t1.cTitle

			  from
			  (select distinct coalesce(n.cTitle,'') cTitle
			  from cadoc_crm..tContact n
			  )t1

			  order by t1.cTitle
			 

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t2.Title IN ( SELECT splitdata FROM  dbo.fnSplitString(@Title,',') )

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USE [cadoc_crm]
GO
/****** Object:  UserDefinedFunction [dbo].[fnSplitString]    Script Date: 11/6/2017 6:14:15 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [dbo].[fnSplitString] 
( 
    @string NVARCHAR(MAX), 
    @delimiter CHAR(1) 
) 
RETURNS @output TABLE(splitdata NVARCHAR(MAX) 
) 
BEGIN 
    DECLARE @start INT, @end INT 
    SELECT @start = 1, @end = CHARINDEX(@delimiter, @string) 
    WHILE @start < LEN(@string) + 1 BEGIN 
        IF @end = 0  
            SET @end = LEN(@string) + 1

        INSERT INTO @output(splitdata)  
        VALUES(SUBSTRING(@string, @start, @end - @start)) 
        SET @start = @end + 1 
        SET @end = CHARINDEX(@delimiter, @string, @start)

    END 
    RETURN 
END

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