diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/merge/ProgramMultiUserMergeManager.java b/Ghidra/Features/Base/src/main/java/ghidra/app/merge/ProgramMultiUserMergeManager.java
index 3dc78f7f0d..26c30fe2e5 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/merge/ProgramMultiUserMergeManager.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/merge/ProgramMultiUserMergeManager.java
@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -106,7 +106,6 @@ public class ProgramMultiUserMergeManager extends MergeManager {
 		ListingMergeManager listingMergeManager =
 			new ListingMergeManager(this, resultProgram, originalProgram, latestProgram, myProgram,
 				(ProgramChangeSet) latestChangeSet, (ProgramChangeSet) myChangeSet);
-		listingMergeManager.setShowListingPanel(showListingPanels);
 		mergeResolvers[idx++] = listingMergeManager;
 
 		mergeResolvers[idx++] =
@@ -406,6 +405,15 @@ public class ProgramMultiUserMergeManager extends MergeManager {
 		return isShowingListingMergePanel;
 	}
 
+	/**
+	 * Determine if the listing panels should be rendered.
+	 * NOTE: This is provided for testing performance reasons only.
+	 * @return true if listing panels should be rendered
+	 */
+	public boolean isShowListingPanel() {
+		return showListingPanels;
+	}
+
 }
 
 class MergeNavigatable implements Navigatable {
diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ListingMergeManager.java b/Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ListingMergeManager.java
index e309e77518..8c4fefc47c 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ListingMergeManager.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/merge/listing/ListingMergeManager.java
@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -130,7 +130,6 @@ public class ListingMergeManager implements MergeResolver, ListingMergeConstants
 
 	private int totalConflictsInPhase; // Total number of conflicts for current phase of listing.
 	private int conflictNum; // Current conflict number being resolved.
-	private boolean showListingPanel = true;
 
 	/**
 	 * Manages listing changes and conflicts between the latest versioned
@@ -160,14 +159,6 @@ public class ListingMergeManager implements MergeResolver, ListingMergeConstants
 		return functionTagMerger;
 	}
 
-	/**
-	 * True signals to show the listing panel (default); false signals to show an empty listing (faster)
-	 * @param showListingPanel
-	 */
-	public void setShowListingPanel(boolean showListingPanel) {
-		this.showListingPanel = showListingPanel;
-	}
-
 	/* (non-Javadoc)
 	 * @see ghidra.app.merge.MergeResolver#apply()
 	 */
@@ -512,7 +503,8 @@ public class ListingMergeManager implements MergeResolver, ListingMergeConstants
 	 * determine conflicts. The conflicts are handled later by calling manualMerge().
 	 */
 	private void initializeMergers() {
-		externalFunctionMerger = new ExternalFunctionMerger(this, showListingPanel);
+		externalFunctionMerger =
+			new ExternalFunctionMerger(this, mergeManager.isShowListingPanel());
 		cuMerge = new CodeUnitMerger(this);
 		functionMerger = new FunctionMerger(this);
 		symbolMerger = new SymbolMerger(this);
@@ -632,8 +624,8 @@ public class ListingMergeManager implements MergeResolver, ListingMergeConstants
 	 */
 	public AddressSet getMergedCodeUnits() {
 		if (mergeManager != null) {
-			return (AddressSet) mergeManager.getResolveInformation(
-				MergeConstants.RESOLVED_CODE_UNITS);
+			return (AddressSet) mergeManager
+					.getResolveInformation(MergeConstants.RESOLVED_CODE_UNITS);
 		}
 		return new AddressSet();
 	}
diff --git a/Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/LabelFieldFactory.java b/Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/LabelFieldFactory.java
index 60ba02be99..8b54022f1d 100644
--- a/Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/LabelFieldFactory.java
+++ b/Ghidra/Features/Base/src/main/java/ghidra/app/util/viewer/field/LabelFieldFactory.java
@@ -156,7 +156,6 @@ public class LabelFieldFactory extends FieldFactory {
 
 		// check to see if there is an offcut reference to this code unit
 		// if there is, then create a "OFF" label
-		//
 		List<Address> offcuts = getOffcutReferenceAddress(cu);
 		boolean hasOffcuts = offcuts.size() > 0;
 
@@ -269,11 +268,16 @@ public class LabelFieldFactory extends FieldFactory {
 
 	private List<Address> getOffcutReferenceAddress(CodeUnit cu) {
 
+		Address startAddr = cu.getMinAddress();
+		if (!startAddr.isMemoryAddress()) {
+			return Collections.emptyList();
+		}
+
 		Program prog = cu.getProgram();
 		if (cu.getLength() == 1) {
 			return Collections.emptyList();
 		}
-		Address nextAddr = cu.getMinAddress().next();
+		Address nextAddr = startAddr.next();
 		if (nextAddr == null) {
 			return Collections.emptyList();
 		}
diff --git a/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/SimpleDiffUtility.java b/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/SimpleDiffUtility.java
index ad8062f6e5..94487815bb 100644
--- a/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/SimpleDiffUtility.java
+++ b/Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/util/SimpleDiffUtility.java
@@ -4,9 +4,9 @@
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -250,7 +250,7 @@ public class SimpleDiffUtility {
 		else if (addr.isExternalAddress()) {
 			Symbol s = program.getSymbolTable().getPrimarySymbol(addr);
 			if (s != null && s.isExternal()) {
-				s = getSymbol(s, otherProgram);
+				s = getMatchingExternalSymbol(program, s, otherProgram, null);
 				if (s != null) {
 					return s.getAddress();
 				}