diff --git a/classes/submission/maps/Schema.php b/classes/submission/maps/Schema.php
index e7712af5754..a824921e92b 100644
--- a/classes/submission/maps/Schema.php
+++ b/classes/submission/maps/Schema.php
@@ -419,7 +419,6 @@ protected function getPropertyReviewAssignments(Enumerable $reviewAssignments):
             $reviews[] = [
                 'id' => (int) $reviewAssignment->getId(),
                 'isCurrentUserAssigned' => $currentUser->getId() == (int) $reviewAssignment->getReviewerId(),
-                'dateAssigned' => $reviewAssignment->getData('dateAssigned'),
                 'statusId' => (int) $reviewAssignment->getStatus(),
                 'status' => __($reviewAssignment->getStatusKey()),
                 'dateDue' => $dateDue,
@@ -648,14 +647,14 @@ protected function getUserGroup(int $userGroupId): ?UserGroup
      *
      * @param Enumerable<Submission> $submissions
      *
-     * @return LazyCollection<StageAssignment> The collection of stage assignments associated with submissions
+     * @return Collection<StageAssignment> The collection of stage assignments associated with submissions
      */
-    protected function getStageAssignmentsBySubmissions(Enumerable $submissions, array $roleIds = []): LazyCollection
+    protected function getStageAssignmentsBySubmissions(Enumerable $submissions, array $roleIds = []): Collection
     {
         $submissionIds = $submissions->map(fn (Submission $submission) => $submission->getId())->toArray();
-
-        $stageAssignmentDao = DAORegistry::getDAO('StageAssignmentDAO'); /** @var StageAssignmentDAO $stageAssignmentDao */
-        return $stageAssignmentDao->getCurrentBySubmissionIds($submissionIds, $roleIds)->remember();
+        return StageAssignment::withSubmissionIds([$submissionIds])
+            ->withRoleIds($roleIds)
+            ->get();
     }
 
     /**