diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/terminologies/expansion/ValueSetExpander.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/terminologies/expansion/ValueSetExpander.java
index 763fa7c3b..bb6c813ea 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/terminologies/expansion/ValueSetExpander.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/terminologies/expansion/ValueSetExpander.java
@@ -557,7 +557,7 @@ public class ValueSetExpander extends ValueSetProcessBase {
 
     try {
       if (source.hasCompose()) {
-        ExtensionsUtils.stripExtensions(focus.getCompose());
+//        ExtensionsUtils.stripExtensions(focus.getCompose()); - disabled 23/05/2023 GDG - why was this ever thought to be a good idea?
         handleCompose(source.getCompose(), focus.getExpansion(), expParams, source.getUrl(), focus.getExpansion().getExtension(), source);
       }
     } catch (EFinished e) {
@@ -877,9 +877,9 @@ public class ValueSetExpander extends ValueSetProcessBase {
           def.checkNoModifiers("Code in Code System", "expanding");
           inactive = CodeSystemUtilities.isInactive(cs, def);
           isAbstract = CodeSystemUtilities.isNotSelectable(cs, def);
+          addCode(dwc, inc.getSystem(), c.getCode(), !Utilities.noString(c.getDisplay()) ? c.getDisplay() : def.getDisplay(), c.hasDisplay() ? vsSrc.getLanguage() : cs.getLanguage(), null, mergeDesignations(def, convertDesignations(c.getDesignation())), 
+              expParams, isAbstract, inactive, imports, noInactive, false, exp.getProperty(), makeCSProps(def.getDefinition(), def.getProperty()), null, def.getExtension(), c.getExtension(), exp);
         }
-        addCode(dwc, inc.getSystem(), c.getCode(), !Utilities.noString(c.getDisplay()) ? c.getDisplay() : def == null ? null : def.getDisplay(), c.hasDisplay() ? vsSrc.getLanguage() : cs.getLanguage(), null, mergeDesignations(def, convertDesignations(c.getDesignation())), 
-            expParams, isAbstract, inactive, imports, noInactive, false, exp.getProperty(), def == null ? null : makeCSProps(def.getDefinition(), def.getProperty()), null, def == null ? null : def.getExtension(), c.getExtension(), exp);
       }
     }
     if (inc.getFilter().size() > 0) {
@@ -963,7 +963,9 @@ public class ValueSetExpander extends ValueSetProcessBase {
   private List<ConceptDefinitionDesignationComponent> mergeDesignations(ConceptDefinitionComponent def,
       List<ConceptDefinitionDesignationComponent> list) {
     List<ConceptDefinitionDesignationComponent> res = new ArrayList<>();
-    res.addAll(def.getDesignation());
+    if (def != null) {
+      res.addAll(def.getDesignation());
+    }
     res.addAll(list);
     return res;
   }
diff --git a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/ElementVisitor.java b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/ElementVisitor.java
index b2e6504a8..25acd88ed 100644
--- a/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/ElementVisitor.java
+++ b/org.hl7.fhir.r5/src/main/java/org/hl7/fhir/r5/utils/ElementVisitor.java
@@ -4,12 +4,17 @@ import org.hl7.fhir.r5.model.Base;
 import org.hl7.fhir.r5.model.Element;
 import org.hl7.fhir.r5.model.Property;
 import org.hl7.fhir.r5.model.Resource;
+import org.hl7.fhir.r5.utils.ElementVisitor.ElementVisitorInstruction;
 
 public class ElementVisitor {
 
+  public enum ElementVisitorInstruction {
+    VISIT_CHILDREN, NO_VISIT_CHILDREN;
+  }
+
   public interface IElementVisitor {
-    public void visit(Object context, Resource resource);
-    public void visit(Object context, Element element);
+    public ElementVisitorInstruction visit(Object context, Resource resource);
+    public ElementVisitorInstruction visit(Object context, Element element);
   }
 
   private IElementVisitor visitor;
@@ -33,13 +38,17 @@ public class ElementVisitor {
   }
 
   public void visit(Object context, Resource res) {
-    visitor.visit(context, res);
-    visitBase(context, res);
+    ElementVisitorInstruction c = visitor.visit(context, res);
+    if (c == ElementVisitorInstruction.VISIT_CHILDREN) {
+      visitBase(context, res);
+    }
   }
 
   public void visit(Object context, Element e) {
-    visitor.visit(context, e);
-    visitBase(context, e);
+    ElementVisitorInstruction c = visitor.visit(context, e);
+    if (c == ElementVisitorInstruction.VISIT_CHILDREN) {
+      visitBase(context, e);
+    }
   }
 
 }
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterScrubbers.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterScrubbers.java
index f23d0fed5..c1cc2eb73 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterScrubbers.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterScrubbers.java
@@ -8,6 +8,7 @@ import org.hl7.fhir.r5.model.Parameters;
 import org.hl7.fhir.r5.model.Resource;
 import org.hl7.fhir.r5.model.ValueSet;
 import org.hl7.fhir.r5.utils.ElementVisitor;
+import org.hl7.fhir.r5.utils.ElementVisitor.ElementVisitorInstruction;
 import org.hl7.fhir.r5.utils.ElementVisitor.IElementVisitor;
 import org.hl7.fhir.utilities.Utilities;
 
@@ -53,16 +54,22 @@ public class TxTesterScrubbers {
     }
     
     @Override
-    public void visit(Object context, Resource resource) {
+    public ElementVisitorInstruction visit(Object context, Resource resource) {
       if (resource instanceof DomainResource) {
         DomainResource dr = (DomainResource) resource;
         dr.getExtension().removeIf(ext -> !isManagedExtension(ext));
       } 
+      return ElementVisitorInstruction.VISIT_CHILDREN;
     }
 
     @Override
-    public void visit(Object context, Element element) {
+    public ElementVisitorInstruction visit(Object context, Element element) {
       element.getExtension().removeIf(ext -> !isManagedExtension(ext));
+      if (element.fhirType().equals("ValueSet.compose")) {
+        return ElementVisitorInstruction.NO_VISIT_CHILDREN;
+      } else {
+        return ElementVisitorInstruction.VISIT_CHILDREN;
+      }
     }
   }
   
diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterSorters.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterSorters.java
index a2473049e..4c840218c 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterSorters.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/special/TxTesterSorters.java
@@ -41,6 +41,7 @@ public class TxTesterSorters {
       Collections.sort(vs.getExpansion().getParameter(), new TxTesterSorters.ExpParameterSorter());
       Collections.sort(vs.getExpansion().getProperty(), new TxTesterSorters.PropertyDefnSorter());
       Collections.sort(vs.getExpansion().getExtension(), new TxTesterSorters.ExtensionSorter());
+      Collections.sort(vs.getExpansion().getContains(), new TxTesterSorters.ContainsSorter());
       for (ValueSetExpansionContainsComponent cc : vs.getExpansion().getContains()) {
         sortContainsFeatures(cc);
       }
@@ -48,6 +49,7 @@ public class TxTesterSorters {
   }
 
   public static void sortContainsFeatures(ValueSetExpansionContainsComponent cc) {
+    Collections.sort(cc.getContains(), new TxTesterSorters.ContainsSorter());
     Collections.sort(cc.getExtension(), new TxTesterSorters.ExtensionSorter());
     Collections.sort(cc.getDesignation(), new TxTesterSorters.DesignationSorter());
     Collections.sort(cc.getProperty(), new TxTesterSorters.PropertyValueSorter());
@@ -129,6 +131,16 @@ public class TxTesterSorters {
   }
   
 
+  public static class ContainsSorter implements Comparator<ValueSetExpansionContainsComponent> {
+
+    @Override
+    public int compare(ValueSetExpansionContainsComponent o1, ValueSetExpansionContainsComponent o2) {
+      return o1.getCode().compareTo(o2.getCode());
+    }
+
+  }
+
+
   public static class ExpParameterSorter implements Comparator<ValueSetExpansionParameterComponent> {
 
     @Override