Variable used for joining conditional query scope is getting overwritten

The two dd($resourceSchedule->count() ) results give different values. I need the $resourceSchedule variable to remain unchanged in order to build the conditional query.

    protected function getResourceItemSchedule($resourceItemId)
    {
      $resourceType = Str::singular(request()->segments()[0]);

      if($resourceType == 'location') $resourceSchedule = Schedule::locationSchedule($resourceItemId);

      if($resourceType == 'service') $resourceSchedule = Schedule::serviceSchedule($resourceItemId);

      if($resourceType == 'provider') $resourceSchedule = Schedule::providerSchedule($resourceItemId);

// dd($resourceSchedule->count() shows 1);
      $resourceItemSchedule = $resourceSchedule->current()->endDateNull()
        ->latest('end_date');
// dd($resourceSchedule->count() shows 0);
      if ($resourceItemSchedule->count() == 0 ) {
        $resourceItemSchedule = $resourceSchedule->current()->endDateNotNull()
        ->latest('end_date');
      }

      if ($resourceItemSchedule->count() == 0 ) {
        $resourceItemSchedule = $resourceSchedule->next()->endDateNull()
        ->oldest('start_date');
        dump($resourceSchedule->count());
        dd($resourceItemSchedule->count());
      }

      if ($resourceItemSchedule->count() == 0 ) {
        $resourceItemSchedule = $resourceSchedule->next()->endDateNotNull()
        ->oldest('start_date');
      }

      return $resourceItemSchedule->first();
    }