How to make SQL Memory Optimized Native Compiled Function Deterministic

Question

Here is a really, really simple function, it comes back deterministic. If I compile it native it's no longer deterministic. How can I make it native compiled and deterministic?

CREATE FUNCTION [hash].[HashDelimiter2]()
RETURNS NCHAR(1)
WITH SCHEMABINDING
AS BEGIN
        RETURN N';'
END
GO

/* This does indeed result in YES */
SELECT IS_DETERMINISTIC
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_NAME = 'HashDelimiter2'



/* But then compile it native and it's no longer deterministic */
CREATE FUNCTION [hash].[HashDelimiter3]()
RETURNS NCHAR(1)
WITH NATIVE_COMPILATION, SCHEMABINDING
AS BEGIN ATOMIC WITH (
    TRANSACTION ISOLATION LEVEL = SNAPSHOT,
    LANGUAGE = N'English'
)
    RETURN N';'
END
GO

/* This results in NO */
SELECT IS_DETERMINISTIC
FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_NAME = 'HashDelimiter3'

Answer 1

only a guess, I do not have 2016 to test it,
but I will try to change:

RETURN N';'

TO

DECLARE @R AS NCHAR(1) = N';'
RETURN @R

I think the problem is that N';' is created as NVARCHAR(1) and then implicit converted to NCHAR(1) so maybe the conversion make it non deterministic.