Monks, I'm seeing some very odd behavior I think might be a bug (in Moose?) but maybe I'm missing something more basic.

So I've got this line of code:

$event->polished_data->{start} = $event->start_time;
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$event is an object created with Moose, polished_data is an attribute and isa HashRef. $event->start_time is a Time::Piece object. Yes, I am copying the Time::Piece from one part of the object to another.

Here's where the weirdness comes in. After the assignment, when I Dumper the event, sometime the value indexed by the start is the Time::Piece object and and the value of $event->start_time looks like this: $VAR1->{'polished_data'}{'start'}. What's really weird is the rest of the time (about 50% of the time), $event->start_time is the Time::Piece object and the indexed value in the hash is $VAR1->{'polished_data'}{'start'}. Witness:

$VAR1 = bless( {
                 'event_id' => '2927',
                 'post_id' => 0,
                 'polished_data' => {
                                      'start' => bless( [
                                                          0,
                                                          0,
                                                          19,
                                                          28,
                                                          2,
                                                          116,
                                                          1,
                                                          87,
                                                          1,
                                                          1459206000,
                                                          1
                                                        ], 'Time::Piec
+e' ),
                                    },
                 'start_time' => $VAR1->{'polished_data'}{'start'},
               }, 'Event' );

$VAR1 = bless( {
                 'start_time' => bless( [
                                          0,
                                          0,
                                          18,
                                          11,
                                          3,
                                          116,
                                          1,
                                          101,
                                          1,
                                          1460412000,
                                          1
                                        ], 'Time::Piece' ),
                 'polished_data' => {
                                      'start' => $VAR1->{'start_time'}
+,
                                    },
               }, 'Event' );
[download]

If anyone can explain what's going on and help me workaround this issue, I'd greatly appreciate it.