Mojolicious session bug?

#!/usr/bin/env perl
use Mojolicious::Lite;
use Data::Dumper;

get '/get' => sub {
    my $self = shift;
    $self->render(text => 'pigs is now ' . $self->session('pigs')->{id});
};

get '/set' => sub {
    my $self = shift;
    $self->session('pigs' => { id => '000500'});
    $self->render(text => 'pigs is now ' . $self->session('pigs')->{id});
};

get '/redir' => sub {
    my $self = shift;
    # After the next line, session('pigs')->{id} = 500, not '000500'
    if($self->session('pigs') && ($self->session('pigs')->{id} == 7)) {
        $self->redirect_to('/get');
    } else {
        $self->render(text => 'pigs no match: ' . $self->session('pigs')->{id});
    }
};

app->start;