Comparing fails when using timezones

[wsd-msp]

When comparing two dates of the same timezone where one of them is closer to 00:00 than the timezone offset, isSame and isBefore will return the wrong result when comparing by day:

$date = new \Moment\Moment('2018-05-16 00:30:00', 'Europe/Copenhagen');
$date2 = new \Moment\Moment('2018-05-16 22:00:00', 'Europe/Copenhagen');

echo 'Is same day: '.($date->isSame($date2, 'day')?'Yes':'No');

Expected output:
Is same day: Yes

Actual output:
Is same day: No

After inspecting the code, i found out it's due to the fact that the dates is converted to UTC before calling startOf($period).