Strange result from Readonly::Clone( scalar from Readonly::Scalar of hashref )

[jimav]

This may be cockpit error, but it seems to me that Readonly::Clone misbehaves when applied to a scalar which is a hashref:

my $original = { AA => [1..3], BB => { X => 5 }, };
my $ro; Readonly::Scalar $ro => $original;
my $rw = Readonly::Clone $ro;

The resulting $rw is not a mutable copy of $ro, but is a scalar ref to a READ-ONLY copy of $ro.

$rw = \{'AA' => [1,2,3],'BB' => {'X' => 5}};

I was expecting an exact mirror image of $rw, with everything below mutable.
I'll attach a demo script.

Readonlyscript.txt