nextOpen() and nextClose() don't return the correct values when called simultaneously about opening-hours HOT 4 CLOSED

final class MyOpeningHours
{
    /**
     * @var OpeningHours
     */
    private $openingHours;

    /**
     * @var string
     */
    private $tz;

    public function __construct(array $data, string $tz = 'UTC')
    {
        $this->openingHours = OpeningHours::create($data);
        $this->openingHours->setTimezone($tz);

        $this->tz = $tz;
    }

    public function nextOpen(DateTimeInterface $dateTime) : DateTime
    {
        $clonedOpeningHours = OpeningHours::create($this->toArray());
        $clonedOpeningHours->setTimezone($this->tz);
        $clonedDateTime = new DateTime($dateTime->format(DateTime::ATOM));

        return $clonedOpeningHours->nextOpen($clonedDateTime);
    }

    /**
     * Return the array that can be used to rebuild another OpeningHours object
     *
     * @return array In a format acceptable by the __construct and factory method
     *
     * [
     *     'monday' => [...]
     *     'tuesday' => [...]
     *     ...
     * ]
     */
    public function toArray() : array { //... }
}