DoctrineDataSource sorting on join table

Hi,
I have problem with sorting in DoctrineDataSource.

$qb = $this->segmentRepository->getQb();
$grid->setDataSource($qb);

$grid->addColumnText('vhCnt', 'admin.grid.segment.vehicleCount')
	->setSortable()
	->setSortableCallback(
		function (QueryBuilder $qb, $val) {
			$qb->leftJoin('q.vehicles', 'vh');
			$qb->groupBy('q.id');
			$qb->addOrderBy('COUNT(vh.id)', reset($val));
		}
	)
	->setRenderer(
		function (Segment $item) {
			return $this->segmentRepository->getVehiclesCount($item);
		}
	);

When u sort by vhCnt column, grid display only one row. Rows counter at the bottom works fine.
When you set fetchJoinCollection to false, everything works fine.
DoctrineDataSource.php:129

$iterator = (new Paginator($this->getQuery(), false))->getIterator();

Start at DoctrineDataSource.php:129 and reproduce the sorting callback shown in the issue, comparing Doctrine Paginator behavior with fetchJoinCollection enabled and disabled. The result should preserve all grid rows while sorting by COUNT(vh.id), with the existing rows counter still working when fetchJoinCollection is enabled.