This Raku code demonstrates a behavior that I don't understand. When the variable $x and $y are assigned to values in hashes, the hashes behave as I'd expect. But when those hashes are pushed into an array, it looks like $x and $y are bound to their slots in the hashes rather than assigned. I don't get it...

gistfile1.txt

my $x = 33;
my $y = 33;
my @space;
my %coords =  'x', $x, 'y', $y;
%coords.say;
@space.push(%coords);
$x = 42;
%coords =  'x', $x, 'y', $y;
%coords.say;
@space.push(%coords);
put "From the array";
for @space { $_.say }