Renew Subscription Does Not Work as It Should

[Elshaden]

The Renew of any subscription does not work. it renews a period starting from starts at not ends at.
which is wrong, if you want to renew existing Subscription the new period added should start from ends at and adds the Interval.

in your code
'
protected function calculate()
{
$method = $this->getMethod();
$start = clone($this->start);
$this->end = $start->$method($this->interval_count);
}
``
this should be in renewal case
protected function calculate()
{
$method = $this->getMethod();
$start = clone($this->end);
$this->end = $start->$method($this->interval_count);
}

so the new period starts from where the last subscription ends.

Good day