diff --git a/IRaCIS.Core.Application/Service/QC/TrialQCQuestionService.cs b/IRaCIS.Core.Application/Service/QC/TrialQCQuestionService.cs
index 3e9871959..0521af0ca 100644
--- a/IRaCIS.Core.Application/Service/QC/TrialQCQuestionService.cs
+++ b/IRaCIS.Core.Application/Service/QC/TrialQCQuestionService.cs
@@ -160,10 +160,10 @@ namespace IRaCIS.Core.Application.Contracts
             var questionlist = await _trialQcQuestionRepository.Where(x => x.TrialId == inDto.TrialId).ToListAsync();
 
             var count = inDto.Ids.Count();
-            var childids = new List<Guid>();
+            var childids = inDto.Ids.Clone();
             while (count > 0)
             {
-                childids = questionlist.Where(x => inDto.Ids.Contains(x.ParentId ?? default(Guid))).Select(x => x.Id).ToList();
+                childids = questionlist.Where(x => childids.Contains(x.ParentId ?? default(Guid))).Select(x => x.Id).ToList();
                 inDto.Ids.AddRange(childids);
                 count = childids.Count();
 
diff --git a/IRaCIS.Core.Application/Service/Reading/MedicalAudit/ReadingMedicineQuestionService.cs b/IRaCIS.Core.Application/Service/Reading/MedicalAudit/ReadingMedicineQuestionService.cs
index 41fb5dd73..7d40ad0bc 100644
--- a/IRaCIS.Core.Application/Service/Reading/MedicalAudit/ReadingMedicineQuestionService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/MedicalAudit/ReadingMedicineQuestionService.cs
@@ -477,10 +477,10 @@ namespace IRaCIS.Core.Application.Service
 			var questionlist =await _readingMedicineTrialQuestionRepository.Where(x => x.TrialReadingCriterionId == inDto.TrialReadingCriterionId).ToListAsync();
 
 			var count = inDto.Ids.Count();
-			var childids = new List<Guid>();
+            var childids = inDto.Ids.Clone();
             while (count > 0)
 			{
-				childids = questionlist.Where(x => inDto.Ids.Contains(x.ParentId ?? default(Guid))).Select(x => x.Id).ToList();
+				childids = questionlist.Where(x => childids.Contains(x.ParentId ?? default(Guid))).Select(x => x.Id).ToList();
 				inDto.Ids.AddRange(childids);
 				count = childids.Count();